General Bearings BALL BEARING UNITS

Transcription

1 General earings LL ERING UNIT

2 all earing Units (contents) Technical section tructure and features... Unit number... Types... 4 election of unit... Life of bearing... earing load... llowable rotational speed... 4 Operating temperature and bearing specifications... 4 trength of housing... Design of shaft and base... 4 Tolerances and internal clearance... 4 Materials... Performance... 4 Handling... Technical section Pillow block type quare-flanged type Rhombic-flanged type Round-flanged type with spigot joint Technical section Pressed steel flange type Take-up type upplementary table implified chart of ball bearing unit combinations... 4 Tightening torques of mounting bolts for housing and cast iron cover... 4 Tightening torques of set screws for inner ring and eccentric locking collar Tightening torques of adapter lock nuts (reference)... 4 Machining dimensions of holes for housing dowel pins... haft tolerances (deviation from nominal dimensions)... Housing bore tolerances (deviation from nominal dimensions)... 4 I units and conversion factors... Inch/millimeter conversion... Mechanical properties of metal materials (reference)... Hexagon socket head cap screws (abstract from JI )... Hexagon head bolts (abstract from JI )... 4 Hexagon head nuts (abstract from JI )... 4 teel hardness conversion... Viscosity conversion... Cartridge type Hanger type all bearings for units Parts and accessories Example of application upplementary table Parts and accessories Example of application upplementary table

3 LL ERING UNIT CT. NO. E-

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5 Publication of New all earing Units Catalog In recent years, needs in industrial world for machineries and equipment highly developed in all aspects have been increased more than ever. Therefore, high technology covering from superior technical advantages incling longer service life and maintenance free to higher reliability even under extraordinary conditions such as high and low temperatures and rotation at a high speed is required for ball bearing units. This catalog completely incles results of technical examinations and abundant research and development. In the first half of this catalog, technical descriptions referring from the selection to the handling of Koyo all earing units are mentioned, while a lot of dimensional tables with types and dimensions are incled in the last half. Varied technical information is provided at the last of this catalog. We trust this catalog will help you to select and use Koyo all earing units appropriately. JTEKT keeps trying to get ideas from the market, step up persistent efforts of technical research and development, and provide the best technologies, quality, and services. JTEKT is grateful for your patronage and look forward to continuing to serve you in the future. The contents of this catalog are subject to change without prior notice. Every possible effort has been made to ensure that the data herein is correct; however, JTEKT cannot assume responsibility for any errors or omissions. Reproduction of this catalog without written consent is strictly prohibited.

6 all earing Units Technical section Contents tructure and features. tructure.... Features... Unit number... Types. Type list.... Types and features Unit for special use... 4 election of unit 4. Outline of selection election of type and specifications election from a maintenance standpoint... Life of bearing. asic rating life and basic rating load.... Calculation of rating life.... Grease life... 4 earing load. Loads applied to bearing.... Distribution of load to bearing.... Dynamic equivalent load....4 asic static load rating and static equivalent load.... Example of applied calculation... llowable rotational speed. llowable rotational speed Correction of allowable rotational speed by fitting... 4 Operating temperature and bearing specifications. Operating temperature and internal clearance of bearing... 4 trength of housing. trength of cast iron housing.... trength of steel housing trength of stainless steel housing trength of compact series housing... 4 Design of shaft and base. Design of shaft Design of base.... Machining dimensions of holes for housing dowel pins... Tolerances and internal clearance. Tolerances of bearing Tolerances of housing.... earing internal clearance... Materials. Materials of bearing.... Materials of housing.... Materials of parts and accessories... Performance. Friction torque of bearing.... Increase in temperature of bearing.... Dustproof and waterproof performance... 4 Handling 4. Installation Test run inspection Periodic inspection upply of grease Replacing bearing.... Operating temperature range... 4

7 Unit specification table pecification tables of ball bearing units... Pillow block type Pillow block type... 4 Thick section pillow block type... Tapped-base pillow block type... 4 Higher centerheight pillow block type... Light duty pillow block type... Compact series pillow block type... tainless-series pillow block type... Pressed steel pillow block type... quare-flanged type quare-flanged type... quare-flanged type with spigot joint... tainless-series square-flanged type... Rhombic-flanged type Rhombic-flanged type... 4 djustable rhombic-flanged type... Three-bolt flange type... Light duty rhombic-flanged type... 4 Compact series rhombic-flanged type... tainless-series rhombic-flanged type... 4 Round-flanged type with spigot joint... Pressed steel flange type Pressed steel round-flanged type... Pressed steel rhombic-flanged type... 4 Take-up type Take-up type... tainless-series take-up type... ection steel frame take-up type... Channel steel frame take-up type... 4 Pressed steel frame take-up type... Other units Cartridge type... 4 Hanger type... all bearings for units... dapter assemblies... Parts and accessories Parts and accessories. Part No. of pressed steel covers.... Part No. of cast iron covers.... Nominal number and dimensions of grease nipples and reducing socket....4 Nominal number and dimensions of llen key wrench... Example of application... upplementary table (contents)... 4 implified chart of ball bearing unit combinations... 4 Tightening torques of mounting bolts for housing and cast iron cover... 4 Tightening torques of set screws for inner ring and eccentric locking collar Tightening torques of adapter lock nuts (reference)... 4 Machining dimensions of holes for housing dowel pins... haft tolerances (deviation from nominal dimensions)... Housing bore tolerances (deviation from nominal dimensions)... 4 I units and conversion factors... Inch/millimeter conversion... Mechanical properties of metal materials (reference)... Hexagon socket head cap screws (abstract from JI )... Hexagon head bolts (abstract from JI )... 4 Hexagon head nuts (abstract from JI )... 4 teel hardness conversion... Viscosity conversion...

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9 tructure and features Koyo all earing Units are highly precise bearing units comprising grease sealed deep groove ball bearings and housings in various forms. The ball bearing units allow easy handling and installation by followings: direct installation to machines and equipment with some bolts, self-aligning, and greasing.. tructure Koyo all earing Unit comprises the ball bearing for unit with spherical outside surface and the housing with spherical bearing seat (Fig..). Grease hole Grease nipple Flinger (linger) Outer ring with spherical outside surface Oil seal all and cage Wide inner ring Hexagon socket set screw Housing (pillow block type) Triple-lip seal Triple-lip seal unit Fig.. tructure of ball bearing units (representative example)

10 tructure and features. Features Koyo all earing Units, having many features, are available in various types. elect the bearing unit optimal for your purpose among the types with unique features. upreme load capacity and accuracy Koyo all earings for bearing unit, featuring the internal structure identical to single row deep groove ball bearings, bear axial load in both directions, as well as great radial load. The tolerance is equal to that of an standard bearing. They feature high rotation accuracy and high speed rotation. Rational self aligning mechanism and optimal fit Koyo all earing Units have self aligning mechanism by the spherical outside surface bearing and the housing with and spherical bearing seat. ecause of this mechanism, deviation of the shaft center caused by warp of the shaft flexion of axis (shaft) or offset is automatically adjusted to eliminate abnormal load onto the bearing, leading to guarantee of original service life of the bearing. ince the spherical outside surface of the bearing is ground and the spherical bearing seat of the housing is machined by a boring machine with high accuracy, optimal fitting of the bearing and the housing can be obtained, as well as superior aligning performance. The allowable aligning angle of standard ball bearing unit is º, while that of ball bearing unit with cover is º. uperior sealing performance Koyo all earing Units can prevent leak of grease in the bearing to the outside, as well as ingress of dusts and water from the outside into the inside of the bearing by the synergetic effect of the oil seal installed to the outer ring of the bearing and the flinger (slinger) installed to the inner ring of the bearing. The oil seal is made of synthetic rubber featuring supreme oil proof. Its lip contacts with the inner ring of the bearing with optimal tension (radial load of lip). When using in environments with many dusts or high humidity, the triple-lip seal unit (supplementary code : L) or the unit with cover (supplementary code : C, CD, FC, FD) is optimal. The triple-lip seal unit or unit with cover strongly prevents ingress of water and dusts from the outside, and guarantees a longer service life of the bearing. tandard type Triple-lip seal type (upplementary code : L) Pressed steel cover type Cast iron cover type ligning angle ligning angle Open ends type (upplementary code : C) (upplementary code : C, FC) Fig.. llowable aligning angle of ball bearing unit Closed end type (upplementary code : CD) (upplementary code : CD, FCD) Unit with cover Fig.. ealing mechanism of ball bearing unit

11 4 imple greasing ecause of the grease nipple on the housing of Koyo all earing Unit, fresh grease can be easily supplied to the bearing being operated. If the bearing is used in severe environments that are exposed to many dusts or high humidity or that is high temperture, supply fresh grease at a regular interval. Then, the lubrication status of the bearing is kept to the best, and the service life of the bearing can be extended. When greasing to the bearing unit with the centralized lubricating system, use the socket for lubricating installed to the grease nipple tapped hole on the housing. Highly rigid and strong housing Koyo all earing Unit housing is designed so that it is optimal for reduction of deformation due to centralization of stress and load. fter the selection of good material, it is produced by highly advanced casting technique or press working technique. ince any abnormal load onto the bearing is eliminated by the highly rigid and strong housing, the service life of the bearing can be extended. aking finish on the surface of the housing keeps good surface status for a long time. Koyo original solid base pillow block housings seat better and produce a more stable mounting configuration that significantly reduces vibration. The support ribs have been eliminated to make more room for mounting bolts and washers, yet these housings are more than % stronger than before while also reducing housing weight. The new housing downward destruction strength means that the inserts break before the housings. imple installation and handling Koyo all earing Units of many types can be installed to any of machine or equipment with some bolts, and can be used in the status as it is. Clearance fit is used for the inner ring of bearing and the shaft, as a rule. Therefore, Koyo all earing Unit does not need any work such as filling of lubricant or installation of sealing unit required for standard bearings. s a result, the total of manpower can be drastically reduced. s for the fixing method of bearing to shaft, three methods, () set screw mounted to the cylindrical bore wide inner ring, () adapter installed to the tapered bore inner ring, and () eccentric locking collar installed to the cylindrical bore wide inner ring are available. Fixing of bearing to shaft can be executed easily and securely by adopting any of these method. Various types Koyo all earing Units are available in various types. Reliability of machine or equipment used together with the units can be improved by selecting and using bearing units optimal for the purpose and operating conditions.

12 Unit number Unit number Nominal number of Koyo all earing Unit conform to JI, and comprise the bearing unit type number (comprising bearing type code and housing type code), diameter series code, bore dia. number, supplementary code, and special code. UC P J L UK P J CD + HX UC F J L FD DK G Nominal bearing number Nominal housing number Housing special code (Table.) Nominal cast iron cover number earing special code (Table.) upplementaly code (Table.) Fitting code (Table.) ore dia. No. (Table.4) Diameter series code (Table.) Housing type code (Table.) earing type code (Table.) Nominal bearing number Nominal housing number Nominal bearing number Nominal housing number Nominal pressed steel cover number UCL PJ UK+HX PJE (Through type) C-x4 (Closed type) D- UCLDKG FJE (Closed type) FD [Remark] The above number shows an example of nominal number structure. It may depend on the bearing unit type. Table. earing type code Table. Housing type code (continued) earing type code UC UC- UK N U U- ER R Housing type code P IP P PH LP P P-H P-H Details Cylindrical bore, with set screws Cylindrical bore, with set screws (stainless-series) Tapered bore (for adapter) Cylindrical bore, with eccentric locking collar Cylindrical bore, with set screws (light duty type) Cylindrical bore, with set screws ( compact series) Cylindrical bore, with eccentric locking collar (light duty type) Cylindrical bore, with set screws (stainless-series) Cylindrical bore, with set screws, cylindrical outer diameter, Lubricating mechanism Cylindrical bore, with set screws, cylindrical outer diameter Table. Housing type code Details Pillow block type Thick section pillow block type Tapped-base pillow block type Higher centerheight pillow block type Light duty pillow block type Pillow block type ( compact series) Pillow block type (stainless-series) Tapped-base pillow (stainless-series) Housing type code P PP F FL F F FC F FL F-H FL-H FL PF PFL T T-H TH TL TU PTH NPTH C H Details Pillow block type (stainless-series) Cast steel pillow block type quare-fl anged type Rhombic-fl anged type djustable rhombic-flanged type Three-bolt fl ange type Round-fl anged type with spigot joint quare-fl anged type Rhombic-fl anged type ( compact series) quare-fl anged type (stainless-series) Rhombic-fl anged type (stainless-series) Rhombic-fl anged type (stainless-series) Pressed steel round-fl anged type Pressed steel rhombic-fl anged type Take-up type Take-up type (stainless-series) ection steel frame take-up type Light channel steel frame take-up type Channel steel frame take-up type Pressed steel frame take-up type Pressed steel frame take-up type Cartridge type Hanger type

13 Table. Diameter series code Table. earing special code ore dia. No. Diameter series code Details For light duty For medium duty X For medium duty For heavy duty Table.4 ore dia. number Details Nominal bearing bore dia. mm Nominal bearing bore dia. mm Nominal bearing bore dia. mm Nominal bearing bore dia. mm Nominal bearing bore dia. mm 4 or more Fitting code J H K upplementary code C ) D ) FC FD L (ore dia. No.) = Nominal bearing bore dia. (mm) (bore dia. No.) / = nominal bearing bore dia. (inch) (in this case, / = inch =. mm) Table. Fitting code Details Tolerance class of spherical bore of the housing is J (not shown on the bearing that the spherical bore diameter exceeds mm) Tolerance class of spherical bore of the housing is H Tolerance class of spherical bore of the housing is K Table. upplementary code Details Cover, open type Cover, closed type Cast iron cover, open type Cast iron cover, closed type Triple-lip seal type Note ) tandard specifications of codes C and D are as shown below., XX...Pressed steel cover XX,...Cast iron cover Item earing special code Details Grease None lvania No. or equivalents D HM D HM D Demnum L- et None ullet Point crew G4 Pointed tip G With full dog point Oil seal None Nitrile rubber K ilicone rubber K Non-contact type ealing Device None With oil seal and flinger (slinger) (UC, UK, N, ER and R types) With oil seal (, and U types) Without oil seal, flinger (slinger) Without oil seal P P4 Others ir handling fit,% noise check, the anti-rotation pin For blower (oil seal : K, inner clearance and Item Grease Nipple Thread ore dia. Grease Nipple Thread ore Position Table. bearing accuracy are specially controlled) tainless steel bearing Plated bearing (for corrosion-resistance) Housing special code Housing special code Details None s shown in dimensional table PT tube thread PF tube thread PT tube thread 4 PF tube thread None s shown in dimensional table Right Left 4º º oth right and left Machining None tandard type E Pressed steel cover mounting groove E Cast iron cover mounting groove (diameter series, X, ) E4 Non-lubricating type Material None Gray iron casting (FC) or cold-reduced carbon steel sheets and strips (PCC) Compact type is made of zinc alloy die-cast (ZDC) mall stainless series is made of stainless cast steel type (C) H tainless steel cast steel model (C) H4 Ductile iron (FCD4-) H Rolled steel for general purpose (4) H tainless steel cast steel model (C4) Grease None type Nipple N type (.º) N C type (º)

14 Types Types. Type list Koyo all earing Units are available in various types. Table. and Table. show the types of Koyo all earing Units and ball bearing for unit. Table. Koyo all earing Units types Type earing bore dia. urface (fixing to shaft) Type code (inch) haft dia. (mm) Dimension table Pillow block type () tandard Cylindrical bore (with set screws) UCP 4 4 P.4 Cylindrical bore (with eccentric locking collar) NP / P. NPK / P. Tapered bore (with adapter) UKP 4 P.4 () Thick section type Cylindrical bore (with set screws) UCIP P. Tapered bore (with adapter) UKIP 4 P. () Tapped-base type Cylindrical bore (with set screws) UCP P.4 (4) Higher centerheight type Cylindrical bore (with set screws) UCPH P. () Light duty type Cylindrical bore (with set screws) LP Cylindrical bore / 4 P. LP (with eccentric locking collar) () Compact series Cylindrical bore (with set screws) UP N/ P. () tainless-series Cylindrical bore (with set screws) UCP-H N/ P. UCP-H N/ 4 P.4 UP- N/ P. () Pressed steel type Cylindrical bore (with set screws) PP Cylindrical bore P. PP (with eccentric locking collar) quare-flanged () tandard Cylindrical bore (with set screws) UCF 4 4 P. type UCF-E / P. Cylindrical bore (with eccentric locking collar) NNF / P. Tapered bore (with adapter) UKF 4 P. () With spigot joint Cylindrical bore (with set screws) UCF 4 4 P. Tapered bore (with adapter) UKF 4 P. () tainless-series Cylindrical bore (with set screws) UCF-H N/ P. Rhombic-flanged () tandard Cylindrical bore (with set screws) UCFL 4 P.4 type UCFL-E P.4 Cylindrical bore (with eccentric locking collar) NNFL / P. Tapered bore (with adapter) UKFL 4 P.4 () djustable type Cylindrical bore (with set screws) UCF / P. () Three-bolt type Cylindrical bore (with set screws) UCF P. (4) Light duty type Cylindrical bore (with set screws) LF Cylindrical bore / P.4 LF (with eccentric locking collar) () Compact series Cylindrical bore (with set screws) UFL N/ P. () tainless-series Cylindrical bore (with set screws) UCFL-H N/ P. UFL- N/ P. 4 Round-flanged Cylindrical bore (with set screws) UCFC 4 P. type with spigot UCFCX-E 4 P. joint Tapered bore (with adapter) UKFC P. Pressed steel () Round-fl anged type Cylindrical bore (with set screws) PF flange type Cylindrical bore / P. PF (with eccentric locking collar) () Rhombic-fl anged type Cylindrical bore (with set screws) PFL Cylindrical bore / P.4 PFL (with eccentric locking collar)

15 Table. Koyo all earing Units types (continued) Type earing bore dia. urface (fixing to shaft) Type code (inch) haft dia. (mm) Dimension table Take-up type () tandard Cylindrical bore (with set screws) UCT 4 4 P. UCT-E / P. Tapered bore (with adapter) UKT 4 P. () tainless-series Cylindrical bore (with set screws) UCT-H N/ P. () ection steel frame type Cylindrical bore (with set screws) UCTH P. (4) Channel steel frame type Cylindrical bore (with set screws) UCTL N/ 4 P.4 UCTU N/ 4 P. () Pressed steel frame type Cylindrical bore (with set screws) PTH N/ P. NPTH N/ P. Cartridge type Cylindrical bore (with set screws) UCC 4 4 P.4 Tapered bore (with adapter) UKC 4 P. Hanger type Cylindrical bore (with set screws) UCH P. Table. Types of ball bearing for Koyo all earing Unit all bearing for units Type earing bore dia. urface haft dia. Dimension Type code (fixing to shaft) (inch) (mm) table () tandard Cylindrical bore (with set screws) UC 4 4 P. () tandard Tapered bore(with adapter) UK 4 P.4 () tandard Cylindrical bore (with eccentric locking collar) N P. (4) Light duty Cylindrical bore (with set screws) 4 P. () Light duty Cylindrical bore (with eccentric locking collar) / 4 P. -F / () Compact Cylindrical bore (with set screws) U N/ P. () tainless steel Cylindrical bore (with set screws) UC- N/ U- N/ P. () Cylindrical outside surface Cylindrical bore (with set screws) (with lubricating mechanism ER / P. and snap ring) () Cylindrical outside surface Cylindrical bore (with set screws) R / 4 P. () dapter assembly HX 4 P.

16 Types. Types and features Koyo all earing Units are available in various types by combinations of bearings and housings. Types and features of the all earing Units are shown below. Remark) Descriptions of codes for unit with cover are shown in the table below. (common to all the types) Diameter series Code Descriptions C, CD Pressed steel cover type FC, FCD Cast iron cover type X C, CD From X to X : pressed steel cover type X and X : cast iron cover type C, CD Cast iron cover type Pillow block type units Pillow block type units UCP UKP Cylindrical bore (with set screws) earing UC (X, ) series are used. UCP (X, ) : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover type or cast iron cover type Cylindrical bore (with eccentric locking collar) earing N series are used. NP, NPK : tandard type, L : Triple-lip seal type Tapered bore (with adapter) earing UK (X, ) series are used. UKP (X, ) : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover type or cast iron cover type NP NPK This is the most typical type ball bearing unit. The rib at the bottom of the housing mounting section allows the highly strong structure which withstands against loads applied from all the directions. The housing can be installed to a machine with two bolts. s for the tapered bore (UKP) type, nominal number of adapter assembly which follows the nominal number of unit should be added. pplications : Transmission devices, general industrial equipment Thick section pillow block type units UCIP UKIP Cylindrical bore (with set screws) earing UC () series are used. UCIP () : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover type or cast iron cover type Tapered bore (with adapter) earing UK () series are used. UKIP () : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover type or cast iron cover type This pillow block type unit is applicable for use with a great load. The thick and highly rigid housing is suitable to environment exposed to a great load, vibration, and impact. The mounting bolt holes are drilled, and the housing can be installed to the exact location with two bolts. pplications : Crane, heavy object conveyor, quarrying plant, ships 4

17 Tapped-base pillow block type unit Cylindrical bore (with set screws) earing UC series are used. UCP : tandard type, L : Triple-lip seal type UCP This pillow block type unit is designed so that the mounting space is reduced. It is installed to machines with the two tapped holes on the housing mounting bottom. pplications : Roller conveyor, purpose with small mounting space 4 Higher centerheight pillow block type unit Cylindrical bore (with set screws) earing UC series are used. UCPH : tandard type, L : Triple-lip seal type UCPH This unit, designed as the higher centerheight pillow block type unit, has high strength against impact load. It is suitable for the machine that the distance from the mounting bottom to the shaft center is long. The housing can be installed to machines with two bolts. pplications : Printing machine, spinneret Light duty pillow block type unit Cylindrical bore (with set screws) earing series are used. LP LP LP Cylindrical bore (with eccentric locking collar) earing series are used. LP This pillow block type unit is designed for the aim of lightweight. The housing can be installed to machines with two bolts. pplications : Machinery for general purposes aiming at lightweight Compact series pillow block type unit Cylindrical bore (with set screws) earing U series are used. UP C, CD : Rubber coating cover type UP The small and lightweight pillow block type unit, comprising the ball bearing for unit for light load and the special lightweight alloy housing, needs not to be lubricated additionally. The housing can be installed to machines with two bolts. pplications : Machineries for light load

18 Types ( Pillow block type units) tainless-series pillow block type units UCP-H UCP-H UP- Cylindrical bore (with set screws) tandard earing UC- series are used. UCP-H C, CD : Pressed stainless steel cover type Tapped base earing UC- series are used. UCP-H C, CD : Pressed stainless steel cover type Compact earing U- series are used. UP- C, CD : Pressed stainless steel cover type This superior anticorrosion pillow block type unit comprises the bearing and housing made of stainless steel. The unit is thinner than standard UCP series units, leading to downsizing of machinery. The housing can be installed to machines with two bolts. pplications : Food machinery, agricultural machinery Pressed steel pillow block type unit PP quare-flanged type units quare-flanged type units UCF, UCF-E NNF PP UKF Cylindrical bore (with set screws) earing series are used. PP Cylindrical bore (with eccentric locking collar) earing series are used. PP This lightweight pillow block type unit for light load comprises the ball bearing for lightweight unit and the pressed steel plate housing. The housing can be installed to machines with two bolts. pplications : Light duty conveyor, environment exposed to light load and low speed rotation Cylindrical bore (with set screws) earing UC (X, ) series are used. UCF (X, ) : tandard type, L : Triple-lip seal type, C, D (FC, FD) : Pressed steel cover type or cast iron cover type UCF (X) -E : tandard type, L : Triple-lip seal type Cylindrical bore (with eccentric locking collar) earing N series are used. NNF : tandard type, L : Triple-lip seal type Tapered bore (with adapter) earing UK (X, ) series are used. UKF (X, ) : tandard type, L : Triple-lip seal type, C, D (FC, FD) : Pressed steel cover type or cast iron cover type This bearing unit comprises the ball bearing for unit and the housing with square flange. It is suitable to use on a vertical surface, such as the side of machinery. The housing can be installed to machines with four bolts.

19 quare-flanged types with spigot joint UCF UKF Cylindrical bore (with set screws) earing UC series are used. UCF : tandard type, L : Triple-lip seal type, C, D : Cast iron cover type Tapered bore (with adapter) earing UK series are used. UKF : tandard type, L : Triple-lip seal type, C, D : Cast iron cover type This bearing unit comprises the ball bearing for unit, square flange, and the housing with spigot joint on the mounting surface. The housing can be installed to a machine by fitting the spigot joint into the mounting hole of it, and using four bolts. The housing can be installed to the exact location by fitting the spigot joint into the mounting hole. pplications : Rotating drum, rotating roller, purposes excellent mounting accuracy is required tainless-series square-flanged type unit Cylindrical bore (with set screws) earing UC- series are used. UCF-H C, D : Pressed stainless steel cover type UCF-H In this superior waterproof and anticorrosion square-flanged type unit, bearing and housing are made of stainless steel. The unit is thinner than standard UCF series units, leading to downsizing of machinery. The housing can be installed to machines with four bolts. pplications : Food machinery, agricultural machinery Rhombic-flanged type units Rhombic-flanged type units UCFL, UCFL-E NNFL UKFL Cylindrical bore (with set screws) earing UC (X, ) series are used. UCFL (X, ) : tandard type, L : Triple-lip seal type, C, D (FC, FD) : Pressed steel cover type or cast iron cover type UCFL (X) -E : tandard type, L : Triple-lip seal type, Cylindrical bore (with eccentric locking collar) earing N series are used. NNFL : tandard type, L : Triple-lip seal type Tapered bore (with adapter) earing UK (X, ) series are used. UKFL (X, ) : tandard type, L : Triple-lip seal type, C, D (FC, FD) : Pressed steel cover type or cast iron cover type This bearing unit comprises the ball bearing for unit and the housing with rhombic flange. It is suitable to use on a vertical surface, such as the side of machinery. Compared to the square-flanged type unit, it requires less mounting space, and the unit weight is also reduced. ince the pitches of the center of two mounting bolt holes on the rhombic-flanged type housing are the same as those of the center of bolt holes located opposite each other on the squareflanged housing, they are compatible. The housing can be installed to machines with two bolts. pplications : Roller conveyor, environment the mounting dimensions are small

20 Types ( Rhombic-flanged type units) djustable rhombic-flanged type unit Cylindrical bore (with set screws) earing UC series are used. UCF : tandard type, L : Triple-lip seal type UCF This rhombic-flanged type unit allows angle adjustment with a supporting point as the shaft center. Therefore, when the bearing unit is installed, fine adjustment of supporting location for the shaft center is enabled. ince the pitches of the center of mounting bolt holes on the housing are the same as those of the square-flanged type unit and rhombic-flanged type unit, they are compatible. The housing can be installed to machines with two bolts. Three-bolt flange type unit Cylindrical bore (with set screws) earing UC series are used. UCF : tandard type, L : Triple-lip seal type, The housing of this unit has the one-side rhombic flange, and the unit is suitable to use on a vertical surface and in a limited space, such as the side of machinery. The housing can be installed to machines with three bolts. UCF 4 Light duty rhombic-flanged type units Cylindrical bore (with set screws) earing series are used. LF LF LF Cylindrical bore (with eccentric locking collar) earing series are used. LF This rhombic-flanged type unit is designed for the aim of lightweight. The housing can be installed to machines with two bolts. Compact series rhombic-flanged type unit Cylindrical bore (with set screws) earing U series are used. UFL C, D : Rubber coating cover type UFL The small and lightweight rhombic-flanged type unit, comprising the ball bearing for unit for light load and the special lightweight alloy housing, needs not to be lubricated additionally. The housing can be installed to machines with two bolts. pplications : Machineries for light load

21 tainless-series rhombic-flanged type units Cylindrical bore (with set screws) tandard earing UCX () - series are used. UCFLX () -H C, D : Pressed stainless steel cover type UCFL-H UFL- Compact earing U- series are used. UFL- C, D : Rubber coating cover type This superior anticorrosion rhombic-flanged type unit comprises the bearing and housing made of stainless steel. The unit is thinner than standard UCFL series units, leading to downsizing of machinery. The housing can be installed to machines with two bolts. pplications : Food machinery, agricultural machinery 4 Round-flanged types with spigot joint Round-flanged types with spigot joint Cylindrical bore (with set screws) earing UC (X) series are used. UCFC (X) : tandard type, L : Triple-lip seal type, C, D (FC, FD) : Pressed steel cover or cast iron cover type UCFCX-E : tandard type, L : Triple-lip seal type UCFC, UCFC-E Pressed steel flange type units UKFC Tapered bore (with adapter) earing UK (X) series are used. UKFC(X) : tandard type, L : Triple-lip seal type, C, D (FC, FD) : Pressed steel cover or cast iron cover type This bearing unit comprises the ball bearing for unit, round flange, and the housing with spigot joint on the mounting surface. The housing can be installed to machines by fitting the spigot joint into the mounting hole of machinery, and using four bolts. The housing can be installed to the exact location by fitting the spigot joint into the mounting hole. pplications : Rotating drum, rotating roller, purposes excellent mounting accuracy is required. Pressed steel round-flanged type units Cylindrical bore (with set screws) earing series are used. PF PF PF Cylindrical bore (with eccentric locking collar) earing series are used. PF This lightweight round-flanged type unit for light load comprises the ball bearing for lightweight unit and the pressed steel plate housing. The housing can be installed to machines with three bolts. pplications : Light duty conveyor, environment exposed to light load and low speed rotation

22 Types ( Pressed steel flange type units) Pressed steel rhombic-flanged type units Cylindrical bore (with set screws) earing series are used. PFL PFL PFL Cylindrical bore (with eccentric locking collar) earing series are used. PFL This lightweight rhombic-flanged type unit for light load comprises the ball bearing for lightweight unit and the pressed steel plate housing. Compared to the pressed steel round-flanged type unit, less mounting space is required. The housing can be installed to machines with two bolts. pplications : Light duty conveyor, environment exposed to light load and low speed rotation Take-up type units Take-up type units Cylindrical bore (with set screws) earing UC (X, ) series are used. UCT (X, ) : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover or cast iron cover type UCT (X) -E : tandard type, L : Triple-lip seal type UCT, UCT-E UKT Tapered bore (with adapter) earing UK (X, ) series are used. UKT(X, ) : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover or cast iron cover type The bearing unit comprises the ball bearing for unit and the housing with slide groove. This unit allows angle adjustment with a supporting point of the shaft center by moving the housing in radial direction along the slide groove. pplications : elt conveyor, use the supporting point of the shaft center must be adjusted tainless-series take-up type unit Cylindrical bore (with set screws) bearing UC- series are used. UCT-H C, CD : Pressed stainless steel cover type UCT-H This superior anticorrosion take-up type unit comprises the bearing and the housing made of stainless steel. The unit is thinner than standard UCT series units, leading to downsizing of machinery. pplications : Conveyor of food machinery, agricultural machinery

23 ection steel frame take-up type unit Cylindrical bore (with set screws) earing UC series are used. UCTH : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel or cast iron cover type UCTH This unit comprises the take-up type unit, the section steel frame, adjuster bolt, and so on. This unit allows adjustment of the supporting point of the shaft center by moving the housing in radial direction with the adjuster bolt on the unit. The housing can be installed to machines with six bolts. pplications : elt conveyor, use the supporting point of the shaft center must be adjusted 4 Channel steel frame take-up type unit Cylindrical bore (with set screws) earing UC () series are used. UCTL : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover or cast iron cover type UCTL UCTU () : tandard type, L : Triple-lip seal type, C, CD (FC, FCD) : Pressed steel cover or cast iron cover type This unit comprises the take-up type unit, the channel steel frame, adjuster bolt, and so on. This unit allows adjustment of the supporting point of the shaft center by moving the housing in radial direction with the adjuster bolt in the frame. ince this unit is installed with the frame stood, the mounting space is reduced. The TL lightweight type unit is made of light channel steel, and the TU highly rigid type unit is made of channel steel. The housing can be installed to machines with two or four bolts. Tapered bore (with adapter) unit is also available (examples of nominal number : UKTL J-, UKTUJ-). pplications : elt conveyor, use the supporting point of the shaft center must be adjusted Pressed steel frame take-up type unit Cylindrical bore (with set screws) earing series are used. PTH NPTH PTH This unit comprises the pressed steel take-up type unit, the pressed steel frame, adjuster bolt, and so on. This unit allows adjustment of the supporting point of the shaft center by moving the housing in radial direction with the adjuster bolt in the frame. ince the housing and the frame are made of pressed steel, the unit is compact and lightweight. The housing can be installed to machines with four or six bolts. pplications : mall belt conveyor for lightload, use the supporting point of the shaft center must be adjusted

24 Types Other units Cartridge type units Cylindrical bore (with set screws) earing UC (X, ) series are used. UCC (X, ) : tandard type, L : Triple-lip seal type UCC UKC Tapered bore (with adapter) earing UK (X, ) series are used. UKC (X, ) : tandard type, L : Triple-lip seal type This unit comprises the ball bearing for unit and the housing with the cylindrical outside surface. The housing, having the grounded cylindrical outer surface, can be fit to the cylindrical bore of a machine. The cartridge type unit, moving in axial direction, is used as the bearing for free side when a shaft is expanded or contracted. The cylindrical outside surface and the automatic aligning mechanism allow handling similar to standard automatic aligning type bearing. Hanger type unit Cylindrical bore (with set screws) earing UC series are used. UCH : tandard type, L : Triple-lip seal type The bearing unit comprises the ball bearing for unit and the housing with parallel thread for pipe on one side. The compact housing is installed to machinery with suspended with steel pipe. pplications : Intermediate bearing of screw conveyor UCH all bearings for units UC type bearing Cylindrical bore (with set screws) UC (X, ) tandard type UC (X, ) L Triple-lip seal type UC- tainless steel series UC This grease sealed type deep groove ball bearing incorporates the outer ring with the spherical outside surface and lubricating mechanism and wide inner ring with cylindrical bore set screw. Two types, standard type (oil seal and flinger are incled) and triple-lip seal type (supplementary code : L), are available, depending on the type of sealing device. It can be fixed to shaft with two set screws on the inner ring. It is the most typical type in ball bearings for unit. The UC- series are superior waterproof and anticorrosive ball bearings for unit. The bearing is made of stainless steel, and the series are used for stainless-series units. s for the types and features of set screw for UC type bearing, see 4 Handling.

25 UK type bearing Tapered bore (with adapter) UK (X, ) tandard type UK () L Triple-lip seal type UK This grease sealed type deep groove ball bearing incorporates the outer ring with the spherical outside surface and lubricating mechanism and wide inner ring with tapered bore. Two types, standard type (oil seal and flinger are incled) and triple-lip seal type (supplementary code : L), are available, depending on the type of sealing device. It can be fixed to shaft with the adapter. The UK type bearing (with adapter) is optimal for use of long shaft. s for the UK type bearing, applicable adapter assembly number should be added to the bearing number. N type ball bearing Cylindrical bore (with eccentric locking collar) N N This type is based on the UC type bearing having set screw, but equipped with the eccentric locking collar. The grease sealed type deep groove ball bearing incorporates the spherical outside surface outer ring with lubricating mechanism and the cylindrical bore, wide inner ring, and eccentric locking collar with eccentric section on one side. The sealing device is equipped with the oil seal and flinger. When fixing the bearing to shaft, fit the eccentric recessed section of the eccentric locking collar to the eccentric section of the inner ring, turn the eccentric locking collar to fix it to shaft, and tighten the set screw of the eccentric locking collar to shaft. 4 type bearing Cylindrical bore (with set screws) This is the lightweight UC type bearing. The non-lubricating type grease sealed deep groove ball bearing incorporates the spherical outside surface outer ring and the wide inner ring with cylindrical bore set screw. When fixing it to shaft, use the two set screws on the inner ring. It is used for lightweight unit or pressed steel unit. type bearing Cylindrical bore (with eccentric locking collar), -F -F This type is based on the type bearing having set screw, but equipped with the eccentric locking collar. The non-lubricating type grease sealed type deep groove ball bearing incorporates the spherical outside surface outer ring and the cylindrical bore, wide inner ring, and eccentric locking collar with eccentric section on one side. When fixing the bearing to shaft, fit the eccentric recessed section of the eccentric locking collar to the eccentric section of the inner ring, turn the eccentric locking collar to fix it to shaft, and tighten the set screw of the eccentric locking collar to shaft. (-F type bearing has lubricating mechanism on outer ring.) It is used for lightweight unit or pressed steel unit.

26 Types ( all bearing for units) U type bearing ( compact series) Cylindrical bore (with set screws) U tandard type U- tainless steel U The bearing series intended for light load is suitable for downsizing and weight saving. The non-lubricating type grease sealed deep groove ball bearing incorporates the spherical outside surface outer ring and the wide inner ring with cylindrical bore set screw. When fixing it to shaft, use the two set screws on the inner ring. The U- type bearing for unit, made of stainless steel, is superior in corrosion resistance, and used for stainless-series units. ER type bearing Cylindrical bore (with set screws), cylindrical outside surface, lubricating mechanism, locating snap ring and snap ring groove ER ER The grease sealed type deep groove ball bearing incorporates the spherical outside surface with lubricating mechanism and set screw, the wide inner ring with cylindrical bore set screw. When fixing it to shaft, use the two set screws on the inner ring. It features lubricating mechanism, set screw (easy to locate bearing), clearance fit of inner ring and shaft (easy to install). Therefore, it can be used for various purposes in a similar way to standard bearings. R type bearing Cylindrical bore (with set screws), cylindrical outside surface R R This bearing is based on the ER type bearing, but without the lubricating mechanism and locating snap ring and snap ring groove. The grease sealed deep groove ball bearing incorporates the spherical outside surface outer ring and the wide inner ring with cylindrical bore set screw. When fixing it to shaft, use the two set screws on the inner ring. ince clearance fit may be used for installation of the inner ring to shaft (easy to install), it can be used for various purposes in a similar way to standard bearings. 4

27 . Unit for special use To meet with requests for varied and special purposes, JTEKT supplies ball bearing series for special use with various features, as well as standard types. If you use ball bearing units under special environment or conditions, select optimal type among ball bearing units for special use. JTEKT produces bearing units in various forms and specifications, other than units for special use. Contact JTEKT, if you need them. Triple-lip seal unit (supplementary code : L) Triple-lip seal has the structure in which the triple-lip oil seal is glued to the pressed steel shield plate with vulcanized adhesive. The triple-lip eliminates ingress of dusts and m water into bearing to ensure long service life of the bearing even under severe environmental conditions. ince the triple-lip seal is fit to the outer ring of the bearing, the triple-lip seal bearing unit can be handled in the same manner as the standard types. The triple-lip seal unit does not lead to uneven contact of the shaft with seal while the bearing is aligned unlike the unit with cover, and maintains stable sealing performance for a long time. The triple-lip seal unit is the outstanding product that defects of conventional dust and water preventive unit are improved to realize energy-saving and low cost. The triple-lip seal is applicable to the UC type bearing and the UK type bearing. Unit with cover (supplementary code : C, D, FC, FD) The unit with cover is equipped with the standard type housing and the pressed steel cover or cast iron cover, and features the double sealing structure of bearing and housing. The unit ensures a long service life of bearing even under severe environmental conditions such as dusts and m water. The unit with cover is available in two types : open ends type C type, FC type, closed end type D type, and FD type (for pillow block type unit, CD type or FCD type). Open ends type Pressed steel cover type Cast iron cover type Closed end type Open ends type Closed end type Fig.. Type and structure of unit with cover Fig.. tructure of triple-lip seal unit Heat resistant unit (special code : DK) and Cold resistant unit (special code : DK) The operating temperature range of a ball bearing unit depends on the performance of grease and oil seal (rubber) used for the bearing. The operating temperature range of Koyo all earing unit (standard type) ranges from ºC to ºC. If you use bearing units in the higher or lower temperature range beyond the operating temperature range of standard type, select the heat resistant (special code : DK) or the cold resistant unit (special code : DK). pecifications of the heat resistant unit and the cold resistant unit are shown in Table.. Table. pecifications of heat resistant unit and cold resistant unit Category pecial code Operating temperature Grease Oil seal earing internal clearance range (ºC) rubber material UC type UK type tandard (no code) to lvania No. or equivalence (lithium soap) Nitrile CN C Heat resistant DK 4 to HM (lithium soap) ilicone C4 C Cold resistant DK to HM (lithium soap) ilicone CN C

28 Types 4 High speed unit (special code : K) The high speed unit (special code : K) is the product that has been developed for intention of high speed and less heat. For the high speed unit bearing, the noncontact type oil seal optimal for high speed rotation and low torque is used. This unit is intended for the purposes high speed rotation, low torque, and less heat are required, such as textile machinery and printing machinery. Unit for blower (special code : ) The ball bearing unit for blower must meet requests for high speed rotation, less heat, less vibration, and low noise. To meet with these requests for performance, JTEKT supplies the series of unit for blower (special code : ) that the non-contact type oil seal is used, as well as improves the machining accuracy. This unit is intended for the purposes high speed rotation, less heat, less vibration, low noise are required, such as a blower. Fig.. tructure of bearing unit for blower Compact series unit For downsizing of machinery in facilities, the set screw method facilitating installation of the shaft is adopted for this unit. The unit comprises the compact bearing and the special alloy housing. ince the cover surface is coated with rubber, it contacts close with the housing well, and features superior dustproof and waterproof performance. Operating temperature range : tandard temperature tainless-series unit (special code : ) The ball bearing units used for food machinery need waterproof performance. For this purpose, JTEKT has released a series of all earing units of which bearings and housings are made of stainless steel in order to satisfy the required performance. We can also provide bearing units packing grease applicable to use related to food certified by UD (U griculture Department) H. Operating temperature range : From ºC to + ºC * If you use this unit for machines splashed with water or in the environment that the operating temperature exceeds ºC, it is recommended you use UC- to be able to be lubricated for U-.

29 4 election of unit 4. Outline of selection Koyo all earing Units are available in various types and series. Therefore, to select the bearing unit optimal for design of machinery, various factors incling the structure of machinery, operating conditions, performance required for bearing unit, specifications relative to the unit, marketability, and economic efficiency, must be comprehensively taken into consideration. ervice life of the bearing greatly depends on the quality of selection. Procedures of selection of standard ball bearing units are shown in Table 4.. Table 4. Procedures of selection of standard ball bearing units Procedures of selection Items to be examined election of type Pillow block type Flange type Take-up type Cartridge type Hanger type election of shaft dia. and dia. series election against atmosphere 4 election against temperature election of installing to shaft earing bore dia. : From to 4 mm Dia. series :,, X, L type Cover type tainless steel series For high speed use For blower Heat resistant type Cold resistant type Measures against expansion and contraction of shaft Grease supply et screw dapter Eccentric locking collar election of shafts Dimensional tolerance doption of shouldered shaft Provision of set screw for shaft Measures against expansion and contraction of shaft election of strength of housings election of lubrication election of maintenance and check Cast iron Cast steel Pressed steel Lubricating type Non-lubricating type Centralized lubricating type Greasing interval Periodic inspection Grease supply Operating conditions to be considered tructure of machinery, mounting space, mounting dimensions Rating life of bearings required, load applied to bearings, rotational speed Environment (dusts, m water, high humidity, chemicals), rotational speed Types (P.) Reference Life of bearing (P.) earing load (P.) llowable rotational speed (P.4) Types (P.) (P.) llowable rotational speed (P.4) earing temperature Types (P.) (P.) Operating temperature and bearing specifications (P.4) Design of shaft and base (P.4) 4 Handling (P.) Rotational speed, load conditions, handling Rotational speed, load conditions, bearing temperature Load conditions, load directions, presence of impact Environment, importance of machine, bearing temperature, grease life Environment, importance of machine, bearing temperature, grease life Types (P.) 4 Handling (P.) Types (P.) (P.) llowable rotational speed (P.4) Design of shaft and base (P.4) 4 Handling (P.) trength of housing (P.) 4 Handling (P.) 4 Handling (P.)

30 4 election of unit 4. election of type and specifications Koyo all earing Units series are available in various types and specifications applicable to your purposes. Therefore, when selecting types and specifications of bearing unit, structure of machine, operating conditions, and environment must be fully taken into consideration for comprehensive examination. Outline of selection of ball bearing unit types and specifications are shown in Table 4.. Table 4. () Outline of selection of ball bearing unit types and specifications : cceptable or Yes, : Unacceptable or No Category Performance required earing specifications pplicable housing Operating conditions Fixing to shaft earing tandard et screw dapter Eccentric locking collar Dustproof and waterproof Lightweight et screw dapter et screw ealing structure Oil seal and flinger Triple-lip seal Type code UC UK N UC-L UK-L, Lubrication C, F, F, F, FC, FL, F, H, IP, P, P, PH, T, TH, TL, TU C, FC, NF, NFL, P, T Oil seal Compact et screw U FL, P nticorrosion Oil seal and UC- FL-H, P-H flinger et screw nticorrosion Oil seal U- FL, P and compact Heat resistant Cold resistant For high speed For blower et screw dapter Oil seal and flinger UC UK C, F, F, F, FC, FL, F, H, IP, P, P, PH, T, TH, TL, TU LF, LP, PF, PFL, PP, PTH, NPTH C, F, F, F, FC, FL, F, H, IP, P, P, PH, T Table 4. () Outline of selection of ball bearing unit types and specifications Category Performance required Housing specifications pplicable Type Operating conditions Type Presence bearing Material Lubrication code of cover Housing Pillow block type tandard P Cast iron Thick section (highly strong) IP Cast iron UC (-L), UK (-L) Tapped-base P UC (-L) Higher centerheight PH Cast iron UC (-L) Light duty LP Compact P pecial light alloy U nticorrosion P-H tainless steel UC- nticorrosion and compact P tainless steel U- Pressed steel PP Pressed steel Flange type quare F With spigot joint (square) F Cast iron UC (-L), UK (-L) (round) FC Rhombic FL haft alignment (adjustable rhombic) F Cast iron UC (-L) Cantilever (deformed) F Light duty (rhombic) LF Cast iron Compact (rhombic) FL pecial light alloy U nticorrosion (rhombic) FL-H tainless steel UC- nticorrosion and compact (rhombic) FL tainless steel U-

31 Table 4. () Outline of selection of ball bearing unit types and specifications Category Performance required Housing specifications pplicable Type Presence bearing Type Operating conditions Material Lubrication code of cover Housing Flange type Pressed steel (round) PF (rhombic) PFL Pressed steel Take-up type tandard T Cast iron UC (-L), UK (-L) ection steel frame type TH Cast iron UC (-L) Channel steel frame type Pressed steel frame type TL TU PTH NPTH Cast iron Pressed steel UC (-L), UK (-L) Cartridge type tandard C Cast iron UC (-L), UK (-L) Hanger type tandard H Cast iron UC (-L) 4. election from a maintenance standpoint Koyo all earing Units need not to be maintained or checked for standard purposes during operation, because of their structures. However, they must be periodically maintained or checked if they are used for important machines or under special environment. Thus, it is important that intervals of periodic maintenance or check during operation are extended or ball bearing units optimal for purposes or operating conditions are selected in order to reduce the manpower required for maintenance and check. For your purposes, various factors must be fully examined. In the environment exposed to vibration or impact, increase in safety factor of service life of the bearing, and strength of the housing must be fully examined. In the environment exposed to great axial load, use of shouldered shaft, in the environment exposed to dusts or m water, use of the triple-lip seal type or covered type, in the environment exposed to high or low temperature, material of oil seal and grease type must be fully taken into consideration.

32 Life of bearing Life of bearing If a ball bearing unit is installed to a machine or device and operated, vibration or noise from the unit may be increased or seizure may occur, after a certain period has passed, even under appropriate conditions. The period of bearing operation until the unit cannot be used due to these causes is called the life of ball bearing unit. Life of a ball bearing unit is caused by two reasons, fatigue of bearing material (fatigue service life) and degradation of grease leading to faulty lubrication, and inability of continuous use. Each of them can be found as the rating life of bearing and grease life. The life of ball bearing unit depends on the shorter one, between the rating life of bearing and grease life. ince the lubricating system is adopted for the Koyo all earing Unit, the grease life can be extended to the rating life of bearing by appropriate lubrication. If the bearing unit is used without lubrication, the shorter period, the rating life of bearing or grease life, is the life of the bearing unit. However, a ball bearing unit is actually installed to a machine or device and operated, the unit cannot be used due to causes other than the rating life of bearing or grease service life (wear, dent, crack, seizure, etc.). They can be prevented by full examination of the selection, handling, installation, and lubrication of the ball bearing unit.. asic rating life and basic rating load.. asic rating life While a bearing is rotated under load, the raceways surfaces of the inner and outer rings of bearing and the rolling surfaces of rolling element are exposed to load continuously. Thus, damages like scales appear on the raceway surfaces or rolling surfaces due to fatigue of material (flaking or peel-off). The total number of revolution until the damages appear is called as (Fatigue) service life of bearing. Fatigue service life of bearing may be greatly varied even if the bearings having the same structure, dimensions, materials, and machining methods, are operated under the same operating conditions. To solve this problem, if a group of the same bearings are operated under the same conditions, the total number of revolution of % of the bearings without damage due to rotating fatigue (life of % reliability) is called as the asic rating life of bearing... asic rating load asic rating load indicates the withstanding strength against rolling fatigue of a bearing, that is to say, loading capacity. It is the pure radial load of a certain level and direction (for radial bearing) or central axial load (for thrust bearing) that a million times of rotations can be obtained as the basic rating life if the inner ring of bearing is rotated while the outer ring is stopped (or the outer ring is rotated while the inner ring is stopped). They are called as the basic dynamic radial load rating (Cr) for radial bearing or the basic dynamic axial load rating (Ca) for axial bearings. In the ball bearing for ball bearing unit, it is indicated as the basic dynamic radial load rating (Cr), and the value is shown in the dimensional table.. Calculation of rating life Relation between the basic rating life, basic dynamic load rating, and the dynamic equivalent load of the ball bearing for ball bearing unit can be indicated as the Equation (.). If the ball bearing unit is used at a fixed rotational speed, it is convenient that the life is indicated as time, as shown in the Equation (.). (Total revolution) (Time) Whereas, L = Cr Pr (.) Cr Lh = (.) n Pr L : asic rating life Lh : asic rating life Cr : asic dynamic load rating Pr : Dynamic equivalent load (see earing load ) n : Rotational speed rotations h N N min Calculation of the basic rating life with using the life factor ( f h) and the speed factor ( f n) in the Equation (.) are shown below. Lh = f h (.) Life factor f h = f n peed factor f n = Cr Pr n (.4) / / = (.n) (.) [all bearing] peed f n n Values of f n, f h and Lh can be easily found by the nomogram of Fig ervice life f h Lh 4 Fig.. Rotational speed (n) and its coefficients ( fn), and service life coefficient ( fh) and basic rating life (Lh)

33 .. Correction of basic rating load for high temperature use If a ball bearing unit is used at a high temperature, structure of bearing material is changed, leading to decreased hardness, and the basic dynamic load rating is reduced than that of the use at standard temperature. Once the structure of bearing material is changed, it will not be restored even if the temperature returns to standard level. Therefore, when using a ball bearing unit at ºC or more, the basic rating load must be corrected by multiplying the basic dynamic load rating shown in dimensional table by the temperature factor shown in Table.. If the ball bearing unit has been used for a long period at ºC or more, fluctuations in dimensions of the bearing may be increased. If you use it under such conditions, contact JTEKT. Table. Temperature factor earing temperature, ºC Temperature factor..... Modified rating life Lnm The life of rolling bearings was standardized as a basic rating life in the s, but in actual applications, sometimes the actual life and the basic rating life have been quite different due to the lubrication status and the influence of the usage environment. To make the calculated life closer to the actual life, a corrected rating life has been considered since the s. In this corrected rating life, bearing characteristic factor a (a correction factor for the case in which the characteristics related to the life are changed due to the bearing materials, manufacturing process, and design) and usage condition factor a (a correction factor that takes into account usage conditions that have a direct influence on the bearing life, such as the lubrication) or factor a formed from the interdependence of these two factors, are considered with the basic rating life. These factors were handled differently by each bearing manufacturer, but they have been standardized as a modified rating life in IO in. In, JI (dynamic load ratings and rating life) was amended to conform to the IO. The basic rating life (L) shown in Equation (.) is the (fatigue) life with a dependability of % under normal usage conditions for rolling bearings that have standard factors such as internal design, materials, and manufacturing quality. JI : specifies a calculation method based on IO :. To calculate accurate bearing life under a variety of operating conditions, it is necessary to consider elements such as the effect of changes in factors that can be anticipated when using different reliabilities and system approaches, and interactions between factors. Therefore, the specified calculation method considers additional stress due to the lubrication status, lubricant contamination, and fatigue load limit Cu (refer to P.) on the inside of the bearing. The life that uses this life modification factor aio, which considers the above factors, is called modified rating life Lnm and is calculated with the following Equation (.). Lnm = a aio L (.) In this equation, Lnm : Modified rating life rotations This rating life has been modified for one of or a combination of the following: reliability of % or higher, fatigue load limit, special bearing characteristics, lubrication contamination, and special operating conditions. L : asic rating life rotations (reliability: %) a : Life modification factor for reliability... refer to section () aio : Life modification factor... refer to section () [Remark] When bearing dimensions are to be selected given Lnm greater than % in reliability, the strength of shaft and housing must be considered. () Life modification factor for reliability a The term reliability is defined as for a group of apparently identical rolling bearings, operating under the same conditions, the percentage of the group that is expected to attain or exceed a specified life in IO :. Values of a used to calculate a modified rating life with a reliability of % or higher (a failure probability of % or less) are shown in Table.. Table. Life modification factor for reliability a Reliability, % Lnm a L m L m L 4m L m L m L m L.m L.m L.4m L.m L.m L.m L.m L.m (Citation from JI :)

34 Life of bearing () Life modification factor aio a) ystem approach The various influences on bearing life are dependent on each other. The system approach of calculating the modified life has been evaluated as a practical method for determining life modification factor aio (ref. Fig..). Life modification factor aio is calculated with the following equation. diagram is available for each bearing type (radial ball bearings, radial roller bearings, thrust ball bearings, and thrust roller bearings). (Each diagram (Figs.. to.) is a citation from JI :.) Note that in practical use, this is set so that life modification factor aio. earing Type earing number (bearing dimensions) C, C Fatigue load limit C u pplication rotational speed, load, sealing performance usage temperature, kinematic viscosity of lubricating oil lubricating method, contamination particles Life modification factor a IO Fig.. Viscosity ratio κ ystem approach Contamination factor e c ec Cu aio = f, κ (.) P aio κ = 4... aio κ = eccu/p eccu/p Fig.. Life modification factor a IO (Radial ball bearings) Fig..4 Life modification factor a IO (Radial roller bearings) aio κ = 4.. aio κ = eccu/p eccu/p Fig.. Life modification factor a IO (Thrust ball bearings) Fig.. Life modification factor a IO (Thrust roller bearings) (Figs.. to. Citation from JI :)

35 b) Fatigue load limit Cu For regulated steel materials or alloy steel that has equivalent quality, the fatigue life is unlimited so long as the load condition does not exceed a certain value and so long as the lubrication conditions, lubrication cleanliness class, and other operating conditions are favorable. For general high-quality materials and bearings with high manufacturing quality, the fatigue stress limit is reached at a contact stress of approximately. GPa between the raceway and rolling elements. If one or both of the material quality and manufacturing quality are low, the fatigue stress limit will also be low. The term fatigue load limit Cu is defined as bearing load under which the fatigue stress limit is just reached in the most heavily loaded raceway contact in IO :. and is affected by factors such as the bearing type, size, and material. For details on the fatigue load limits of special bearings and other bearings not listed in this catalog, contact JTEKT. κ greater than 4, equal to 4, or less than. is not applicable. For details on lubricants such as grease and lubricants with extreme pressure additives, contact JTEKT. ν κ = (.) ν ν : ctual kinematic viscosity at the operating temperature; the viscosity of the lubricant at the operating temperature ν : Reference kinematic viscosity; determined according to the speed and pitch diameter of ball/roller set Dpw of the bearing (ref. Fig..) ν, mm /s c) Contamination factor ec If solid particles in the contaminated lubricant are caught between the raceway and the rolling elements, indentations may form on one or both of the raceway and the rolling elements. These indentations will lead to localized increases in stress, which will decrease the life. This decrease in life attributable to the contamination of the lubricant can be calculated from the contamination level as contamination factor ec. Dpw shown in this table is the pitch diameter of ball/ roller set, which is expressed simply as Dpw = (D + d). (D: Outside diameter, d: ore diameter) For information such as details on special lubricating conditions or detailed investigations, contact JTEKT. Fig.. n, min - D pw, mm (Fig.. Citation from JI :) Reference kinematic viscosity ν d) Viscosity ratio κ The lubricant forms an oil film on the roller contact surface, which separates the raceway and the rolling elements. The status of the lubricant oil film is expressed by viscosity ratio κ, the actual kinematic viscosity at the operating temperature ν divided by the reference kinematic viscosity ν as shown in the following equation. Table... ervice life of bearing system comprising two or more bearings Even for systems which comprise two or more bearings, if one bearing is damaged, the entire system malfunctions. Where all bearings used in an application are regarded as one system, the service life of the bearing system can be calculated using the following equation, Values of contamination factor ec Contamination level Dpw < mm Dpw mm Extremely high cleanliness: The size of the particles is approximately equal to the thickness of the lubricant oil film, this is found in laboratory-level environments. High cleanliness: The oil has been filtered by an extremely fine filter, this is found with standard grease-packed bearings and sealed bearings.. to.. to. tandard cleanliness: The oil has been filtered by a fine filter, this is found with standard grease-packed bearings and shielded bearings.. to.. to. Minimal contamination: The lubricant is slightly contaminated.. to.. to.4 Normal contamination: This is found when no seal is used and a coarse filter is used in an environment in which wear debris and particles from the surrounding area penetrate. to..4 to. into the lubricant. High contamination: This is found when the surrounding environment is considerably contaminated and the bearing sealing is insufficient.. to. to Extremely high contamination (Table. Citation from JI :) ec

36 Life of bearing = (.) L e L e L e L e where : L : rating life of system L, L, L : rating life of each bearing e : constant e = / ball bearing e = roller bearing The mean value is for a system using both ball and roller bearings. [Example] When a shaft is supported by two roller bearings whose service lives are hours and hours respectively, the rating life of the bearing system supporting this shaft is calculated as follows, using Equation (.) : = + L L h The equation suggests that the rating life of these bearings as a system becomes shorter than that of the bearing with the shorter life. This fact is very important in estimating bearing service life for applications using two or more bearings...4 Recommended service life of bearing Excessively long life of ball bearing unit does not lead to economic operation. etup of the recommended service life of bearing unit depending on the type of machine the ball bearing unit is used together and operating conditions is required. Recommended service life of ball bearing unit empirically adopted is shown in Table.4. Table.4 Operating conditions Operated in short period or intermittently Discontinuously but for a long period lways operated for hours or longer a day or operated continuously for a long period Operated continuously for 4 hours, no fault is allowed Recommended service life of ball bearing unit (reference) pplication Home electric appliances, electric tool, agricultural machinery, hoist, etc. Factory motor, general gear, etc. General machinery, blower, etc. Electric power plant facility, mine drainage facility, etc. Recommended service life, h 4. Grease life Grease life of a ball bearing for ball bearing unit is influenced by the level of load, rotational speed of bearing, and operating temperature. Grease life of a ball bearing for unit used under appropriate operating conditions can be found by the equation shown below. log L =. 4.4 dmn.. (.. dmn) T (.) Whereas, L : Grease life h dm : Pitch dia. of ball set mm (D + d) dm = D : Nominal bearing outer dia., d : Nominal bearing bore dia. n : Rotational speed of bearing min Pr : Dynamic equivalent radial load N (see earing load ) Cr : asic dynamic radial load rating of bearing N T : Operating temperature of bearing ºC pplicable conditions for the Equation (.) are shown below. ) Operating temperature of bearing : T C To be applied if the following condition is satisfied : T If T is smaller than (T < ), following condition should be applied : T =. If T is larger than (T > ), contact JTEKT. ) Rotationl speed of bearing : dmn To be applied if the following condition is satisfied : dmn 4 If dmn is smaller than. 4 (dmn <. 4 ), following condition should be applied : dmn =. 4 If dmn is larger than 4 (dmn > 4 ), contact JTEKT. ) Load condition of bearing : To be applied if the following condition is satisfied : Pr Cr. Pr Cr Pr Cr Pr Cr Pr Cr If is smaller than. ( <.), Pr Cr following condition should be applied : =. Pr Cr Pr Cr If is larger than. ( >.), contact JTEKT. Reference figure of grease life obtained by the Equation (.) is shown in Fig... 4

37 earing load () earing load Pr Grease life L (h) Grease life L (h) Grease life L (h) Cr () earing load Pr. Rotational speed dmn ( 4 ) Cr () earing load Pr Fig.. =. =.. Rotational speed dmn ( 4 ) Cr =.. Rotational speed dmn ( 4 ) Operating temperature T = C Operating temperature T = C Operating temperature T = C Relation of grease life to bearing load, rotational speed, and operating temperature (reference) s for the loads applied to a bearing, load caused by weight of object supported by the bearing, transmitting force of gears and belts, load generated in the machine operated are incled. In many cases, these loads cannot be found out by simple calculation. ecause the loads are not fixed but fluctuated, and it is difficult to fix the level and direction of the fluctuations. Therefore, in general, to find the loads applied to a bearing, the following steps are adopted : multiply the load to be able to be found theoretically by various factors obtained empirically.. Loads applied to bearing.. Load factor Even if radial load and axial load to be applied to a bearing can be found by standard dynamical calculation, loads actually applied to the bearing are greater than the calculated values because of vibration and impact generated while machine is being operated. To find the loads actually applied to a bearing, multiply the theoretically found values by load factor. F = f w Fc (.) Whereas, F : Load actually applied to bearing Fc : Theoretically calculated load f w : Load factor (see Table.) Table. Load factor f w Operating conditions pplications f w Virtually no vibration or Electric machines. impact and instruments tandard operation (weak impact) Great vibration and impact.. Loads in case of belt or chain transmission gricultural machines and blower Constructive machines and grinder. s for belt transmission, theoretical load applied to the pulley shaft can be found by effective transmission force of belt. ctually, the effective transmission force must be multiplied by load factor ( f w) obtained with taking vibration and impact generated while machine is being operated into consideration and belt factor ( f b) with taking belt tension into consideration. s for chain transmission, factor equivalent to the belt factor for belt transmission must be multiplied. N N

38 earing load Fb = M f w f b Dp. W = f w f b (.) Dp n Whereas, Fb : Load actually applied to pulley shaft or sprocket shaft M : Torque applied to pulley or sprocket W : Transmitted power Dp : Pitch circle dia. of pulley or sprocket n : Rotational speed f w : Load factor (see Table.) f b : elt factor (see Table.) Table. elt factor f b elt type f b Toothed belt. V belt. Flat belt (with tension pulley). Flat belt 4 Chain.. N mn m kw mm min Whereas, Kt : Load applied to gear in tangential direction (tangential line force) N Kr : Load applied to gear in radial direction (separating force) N Kg : ynthetic load applied to gear N M : Torque applied to gear mn m Dp : Pitch circle dia. of gear mm W : Transmission power kw n : Rotational speed min α : Pressure angle of gear deg Note that the actual gear load must be found by multiplying the theoretical load by load factor ( f w) obtained with taking vibration and impact generated while machine is being operated into consideration and gear factor ( f g) with taking accuracy and finish of gear into consideration. Fg = f w f g Kg (.) Whereas, Fg : Load actually applied to gear N Kg : Theoretically synthetic load applied to gear N f w : Load factor (see Table.) f g : Gear factor (see Table.).. Load in case of gear transmission Table. Gear factor f g s for gear transmission, load in tangential direction (Kt), load in radial direction (Kr), and axial load (Ka) are incled as the theoretical loads applied to a gear. They can be dynamically found by transmission force and gear type. The followings show the example of standard flat gear (as for flat gear, no axial load applied is expected.). () Load applied to gear in tangential direction (tangential line force) Gear type f g Precision gear. ( both pitch error and tooth profile error should be. mm or less) tandard gear.. ( both pitch error and tooth profile error should be. mm or less) M Kt = = Dp. W Dpn (.) () Load applied to gear in radial direction (separating force) Kr = Kt tan α (.4) () ynthetic load applied to gear Kg = Kt + Kr = Kt secα (.)

39 . Distribution of load to bearing To distribute the load applied to the shaft system into the bearing which supports the shaft, find the radial component force of each load, and calculate the vector sum in accordance with the direction of load. Fig.. shows the example of distribution of radial load. In many cases, a bearing bears radial load as well as axial load, leading to synthetic loads. In such a case, convert it into dynamic equivalent load, and consider it as the bearing load. F l l F l l l l F F F l F = l F (.) l F = l F (.) F Table.4 Radial load factor (X) and axial load factor (Y) f Fa Fa / Fr e Fa / Fr > e e Cr X Y X Y [Remarks]. Cr (basic static radial load rating) and f (factor) are shown in the dimensional tables.. If f Fa / Cr does not conform to the table above, find by interpolation. Fig.. Distribution of load to bearing. Dynamic equivalent load In many cases, a bearing is exposed to the synthetic load of radial load and axial load, and it is used under various conditions, incling fluctuated load thus, the load actually applied to the bearing cannot be directly compared to the basic dynamic load rating. In such a case, find the load running the bearing center in a fixed level and direction that allows the same bearing life as the actual bearing load and rotational speed. Then, compare it with the basic dynamic load rating. The converted virtual load is called dynamic equivalent load (P)... Calculation of dynamic equivalent load The dynamic equivalent radial load (Pr) of a radial bearing (ball bearing for unit is incled) that bears the synthetic load in a fixed level and direction can be found by the equation shown below. Pr = XFr + YFa (.) Whereas, Pr : Dynamic equivalent radial load Fr : Radial load Fa : xial load X : Radial load factor (see Table.4) Y : xial load factor (see Table.4) N N N

40 earing load.. Mean dynamic equivalent load in case of fluctuated load If level or direction of the load applied to a bearing is fluctuated, it is necessary to find the mean dynamic equivalent load to allow the same bearing life as that under actual fluctuated conditions. Table. shows the method of finding the mean dynamic equivalent load under various fluctuated conditions. Table. Calculation of mean dynamic equivalent load in case of fluctuated load () taged fluctuation (4) ine curve fluctuation (upper half of sine curve) P P max P m Σn it i Pm =. Pmax (.) Pm = p P P P P m P n n t n t n nt n P p nt + P p nt + + Pn p nntn nt + nt + + nntn (.) () tageless fluctuation Whereas, Pm : Mean dynamic equivalent load N P : Dynamic equivalent load actuating for t hours at rotational speed of n N P : Dynamic equivalent load actuating for t hours at rotational speed of n N Pn : Dynamic equivalent load actuating for tn hours at rotational speed of nn N Pmin : Minimum dynamic equivalent load N Pmax : Maximum dynamic equivalent load N Σniti : Total rotating frequency for t to ti hours P P m P max.4 asic static load rating and static equivalent load Pm = Pmin + Pmax P min Σn it i (.) () ine curve fluctuation P P m Σn it i P max Pm =. Pmax (.).4. asic static load rating If a bearing is exposed to excessive static load or impact load even under extra low rotational speed, partial permanent deformation occurs to the contact surface of the raceway of bearing with the rolling element. The permanent deformation increases with the increase of load, and when it exceeds a fixed level, smooth rotation of the bearing is interfered. asic static load rating of a bearing is the static load to generate the calculated contact stress shown below at the center of contact surface of the raceway the maximum load is applied and the rolling element. () elf-aligning ball bearing... 4 MPa () Other ball bearings (ball bearing for unit is incled)... 4 MPa () Roller bearing... 4 MPa The total permanent deformation of bearing raceway and rolling element to be generated under these contact stresses are. times of the diameter of rolling element. In the ball bearing for unit, it is indicated as the basic static radial load rating (Cr), and the values are shown in the dimensional tables.

41 .4. tatic equivalent load tatic equivalent load is the virtual load converted into the level that allows the generation of the same contact stress at the contact face of the raceway of bearing and rolling element that are exposed to the maximum stress as the contact stress under the actual load conditions, when a bearing is stopped or rotated at extra low speed. tatic equivalent radial load (Por) of the ball bearing for unit can be calculated by the equation below (use greater value). Pr =. Fr +. Fa (.4) (.) Pr = Fr. Example of applied calculation Example Distributing load Find the load applied to the bearing and bearing, if the radial load F (F =. kn) and F (F = 4. kn) are applied. F F Whereas, Pr : tatic equivalent radial load Fr : Radial load Fa : xial load N N N () Find the radial load F applied to the bearing by F, with Equations (.) and (.)..4. afety factor The static equivalent load allowed by a bearing depends on the basic static load rating of the bearing, and the limitation of use of bearing by the permanent deformation (partial dent) of the bearing depends on the performance required for the bearing or operating conditions. Therefore, in order to examine the safety of the basic static load rating of the bearing, safety factor is defined taking conventional experiences into consideration. Cr f s = (.) Pr Whereas, f s : afety factor (see Table.) Cr : asic static radial load rating Pr : tatic equivalent radial load N N F =. =. (kn) In a similar manner, find the radial load F applied to the bearing by F. F = 4. =. (kn) [Remark] Negative load is the upward load. Radial load F applied to the bearing : F = F + F =. + (.) =. (kn) () In a similar manner to (), find the radial load F applied to the bearing. F =. =. (kn) F = 4. =. (kn) Table. afety factor f s (recommended) F = F + F =. +. =. (kn) Operating conditions f s (Min.) High rotating accuracy is required eing rotated tandard operating conditions Impact. Not always being rotated sometimes oscillated tandard operating conditions Impact, unevenly distributed load.

42 earing load Example Calculating load by V-belt transmission Find the load applied to the bearing and bearing when the shaft is driven by the V-belt, transmission power W is. kw (W =. kw), rotational speed n is min (n = min ), effective diameter of pulley Dp is mm (Dp = mm). 4 Example 4 Calculating bearing life Under the conditions shown in the Example, find the bearing life Lh when a bearing is used for a blower of the rotational speed n, min. () elect the load factor f w is. ( f w =.) from Table., and find the bearing load Pr. Pr = f w F =.. =. (kn) () The dynamic radial load rating of UCPJ (bearing UC), Cr, is. kn (Cr =. kn), and calculate the bearing life Lh with the Equation (.). Cr Lh = = n Pr (h).. () Find the load actually applied to the pulley shaft Fb with Equation (.). From Table., load factor f w is. ( f w =.), and the belt factor f b is. ( f b =.), from Table.. Fb =. W Dp n f w f b.. =.. = 4. (kn) () Find the load actually applied to the bearing and bearing (F and F) with Equations (.) and (.). F = 4 4. =. (kn) () Calculate bearing life Lh with the nomogram shown in Fig... When the rotational speed n is min (n = min ), rotational factor f n is. ( f n =.). next, find the life factor f h by speed factor f n, dynamic radial load rating of bearing Cr, and the bearing load Pr. Cr Life factor f h = f n =. Pr =.4.. From life factor f h, bearing life Lh hours. F = 4. =. (kn) Example Calculating dynamic equivalent radial load Find the dynamic equivalent radial load Pr when the radial load Fr,. kn (Fr =. kn), and the axial load Fa,. kn, (Fa =. kn) are applied to the pillow block type unit UCPJ (bearing UC). () Find the radial load factor (X) and the axial load factor (Y) with using the static radial load rating Cr of UCPJ (bearing UC),. kn (Cr =. kn), and Table.4. f Fa Cr Fa Fr.. = =.4, e =.4.. = =. > e (.4). Therefore, X =., Y =. () Find the dynamic equivalent radial load Pr with Equation (.). Pr = XFr + YFa = =. (kn) Example electing ball bearing unit If a bearing is operated under the following conditions, select the flange type unit (UCF) with at least two years ( hours) or longer service life : rotational speed of shaft n is min (n = min ), and radial load Fr is kn (Fr = kn). The radial load Fr incles the load factor and gear factor. () From the nomogram shown in Fig.., when life time Lh is h (Lh = h), life factor f h can be found as. ( f h.), and speed factor f n can be found as. ( f n.) when the rotational speed n is min (n = min ). f h Dynamic radial load rating Cr = Fr = f n. (kn).. () Find the flange type unit that meets the following condition : dynamic radial load rating Cr is. kn (Cr =. kn). s for the diameter series, UCFJ (dynamic radial load rating Cr is 4.4 kn (Cr = 4.4 kn)) can be selected. 4

43 Example electing pillow block type unit for low speed If a bearing is used for a dolly under the following conditions, select the pillow block type unit (UCP) with hours service life : radial load Fr is kn (Fr = kn), and rotational speed is min. () Find the required dynamic radial load rating Cr with using Equations (.4) and (.). peed factor f n = (.n) /p = (. ) /. Life factor f h = Lh /p = / f h Dynamic radial load rating Cr = Pr = f n. (kn)... () From Table., define safe factor f s as ( f s = ), and find the static radial load rating of bearing required Cr. Cr = f s Pr = = 4 (kn) Example Calculating grease life Find the grease life in the case that pillow block type unit UCP4J (bearing UC4) under the following conditions : radial load Fr is kn (Fr = kn), and rotational speed n is min (n = min ). Note that the radial load Fr incles load factor and belt factor. Operating temperature of the bearing should be 4 ºC. Find the grease life L with using Equation (.). log L =. 4.4 Pr dmn.. Cr (.. dmn) T = (... 4 ) = 4.4 L 4 (h) () The unit is used for a dolly, and vibration or impact may occur. Thus, select UCPJ (Cr = 4. kn, Cr = 4. kn). Example Calculating bearing life in case of use at high temperature Find the bearing life if the heat resistant pillow block type unit (UCPJDK) is operated under the following conditions : operating temperature is ºC, radial load Fr is 4 kn (Fr = 4 kn), and the rotational speed n is min (n = min ). Note that the radial load Fr incles load factor and gear factor. () From Table., find the dynamic load rating Cr with in the case that a bearing is used at ºC. Cr =.4. = 4. (kn) Find the bearing life Lh with using Equation (.). Lh = n Cr Pr (h) 4. = 4 Example Calculating life of bearing unit in case of non-lubrication Find the life of a bearing unit in the case that it is operated under the conditions shown in Example, but without lubrication. () Find the rating life of bearing Lh with using Equation (.). Lh = n Cr Pr 4 (h). = () Compare the grease life L shown in Example to the rating life of bearings Lh. Then, grease life L is shorter than the bearing rating life. Therefore, life of a bearing unit should be the same as the grease life L, 4 hours (L = 4 hours). () If a bearing unit is operated at ºC, grease is degraded faster, and it cannot be used without lubrication. upply grease at intervals specified in Table 4.4. () If the shaft is extended excessively, install a bearing unit on the identical shaft on the fixed side (positioning of shaft), and install another bearing unit on the free side (see Design of shaft and base ). 4

44 llowable rotational speed llowable rotational speed. llowable rotational speed The rotational speed of a bearing is normally affected by friction heat generated in the bearing. If the heat exceeds a certain amount, seizure or other failures occur, thus causing rotation to be discontinued. The allowable rotational speed is the highest speed at which a bearing can continuously operate without generating such critical heat. llowable rotational speed of a ball bearing unit depends on the dimensions of the bearing, type of oil seal, and fitting conditions of bearing inner ring and shaft. Table. shows the standard allowable rotational speeds of ball bearing units. Table. llowable rotational speed of ball bearing units (standard value) ore diameter No. UC type bearing, UC- type bearing, UK type bearing, N type bearing, ER, R type bearing tandard type, cold resistant type (DK) Diameter series Triple-lip sealed (L) Diameter series Heat resistant type (DK) Diameter series Heat resistant type (K), for blower () Diameter series type bearing type bearing Unit : min U type bearing U- type bearing X X, X, X [Remarks]. llowable rotational speed of the units with covers is % of the value shown in the table above.. If a bearing unit is used with excessively loose fitting, allowable rotational speed must be corrected by multiplying it by the fi tting factor f c shown in Table.. 4

45 . Correction of allowable rotational speed by fitting For easier installation of a ball bearing unit to a shaft, clearance fit is used for a bearing inner ring and shaft, in general. ize of fitting clearance between the bearing inner ring and the shaft is related to the allowable rotational speed of the bearing unit. s the rotational speed is increased, the fitting clearance between the bearing inner ring and the shaft should be decreased. Table. shows the fitting factors to correct the allowable rotational speed depending on the types of fitting of the bearing inner ring to the shaft. s for the bearings with set screws, allowable rotational speed must be corrected by multiplying the allowable rotational speed (standard value) by fitting factor, depending on the tolerance class of the shaft used. For the bearings with adapter, shafts of h or h tolerance class are recommended, while shafts of h or j tolerance class are recommended for the bearings with eccentric locking collar. Table. Fitting factor of ball bearing unit f c (recommended) Fitting factor f c Type of ball haft tolerance class bearing unit h, j j h h h h With set screw tandard type..... Triple-lip seal type (upplementary code L)... Heat resistant type (pecial code DK)... Cold resistant type (pecial code DK)... For high speed (pecial code K)... For blower (pecial code )... With adapter.. With eccentric locking collar. Operating temperature and bearing specifications. Operating temperature range Operating temperature range of a ball bearing unit depends on the type of grease used for the bearing, oil seal rubber material, and the internal clearance of the bearing. Koyo all earing Units are available in heat resistant unit (special code : DK) and cold resistant unit (special code : DK) series, as well as standard types, to allow selection optimal for the operating temperature (see Table.). Even though the bearing unit suitable for temperature is used, grease must be fed in accordance with the specified standards, since grease life greatly depends on temperature.. Operating temperature and internal clearance of bearing If the temperature of transmission heat to the shaft is high or hot steam enters the hollow bore of the shaft, difference between the temperatures of the bearing inner and outer rings is increased and the internal clearance of the bearing is decreased, leading to breakage at early stages of the bearing sevice life. Decrease in the internal clearance of the bearing depending on the difference in the temperatures of the bearing inner ring and the bearing outer ring can be found by Equation (.). Under these conditions, decrease in the internal clearance must be calculated, and the internal clearance of bearing needs to be selected properly. t = α De t (.) Whereas, t : Decrease in the internal clearance of bearing depending on the difference in the temperatures of the bearing inner ring and the bearing outer ring mm α : Line expansion factor of bearing steel. De : Raceway dia. of bearing outer ring mm Diameter series, X De. D Diameter series De. D D : Nominal bearing outer dia. mm t : Difference in temperatures of bearing inner ring and outer ring ºC If a ball bearing unit is used at a high temperature, abnormal axial load may be applied to the bearing due to axial extension of the shaft caused by high temperature, leading to breakage at early stages of the bearing service life. This fact must be taken into consideration, as well as the internal clearance of the bearing for use of the bearing at a high temperature. The shaft of free side unit or the unit needs to be able to be moved axially, as the countermeasure against this problem. (ee Design of shaft and base ) 4

46 trength of housing trength of housing The housing for Koyo all earing Unit reliably withstands use under standard operating conditions, because of selection of good material and the highly tough design suitable to the load capacity of the bearing. However, if a great or impact loads occurs at a low rotational speed, strength of the bearing must be examined in advance, for the purpose safety is especially required. lthough the form of the housing is designed so that it is applicable to various purposes, destruction strength varies depending on the direction of load. Therefore, mounting direction of the bearing unit must be fully examined, as well as the strength of the housing. t this time, setting of fixing device to support the housing is required depending on the direction or level of load. Rigidity of the base and flatness of the mounting surface give influence on the strength of the housing. Note that the load applied to the ball bearing unit is recommended to be basically examined by the calculation result of bearing life even if the strength of the housing is satisfied.. trength of cast iron housing Though gray cast iron has many superior features as machine parts material, it is fragile against impact load. Therefore, prior to use of it, level, direction, and property of load applied to it must be fully examined. llowable load of gray cast iron housing can be found by using static destruction strength of the housing, taking safety factor into consideration. Table. shows the safety factor of gray cast iron products against load, and Fig.. to Fig.. show the outline values of static destruction strength of pillow block type, flange type and take-up type housings. Table. afety factor of gray cast iron products (recommended) Property of load afety factor of gray cast iron tatic load 4 With vibration With impact tatic destruction strength kn tatic destruction strength kn P PX, D D C C E P Direction 4 4 P P P P P Nominal number of housing 4 PX PX PX PX PX PX4 PX PXPX Nominal number of housing Direction C Direction Direction D Direction E P Direction Direction C Direction Direction D Direction E tatic destruction strength kn 4 4 P Direction Direction C Direction Direction D Direction E Fig.. P P P P P Nominal number of housing P tatic destruction strength of pillow block type housing (P)

47 D C E C E tatic destruction strength kn IP Direction Direction C Direction Direction D Direction E tatic destruction strength kn 4 4 P Direction Direction C Direction Direction E IP IP IP IP IP IP Nominal number of housing P4 P P P Nominal number of housing tatic destruction strength kn 4 4 IP Direction Direction C Direction Direction D Direction E Fig.. tatic destruction strength of tappedbase pillow block type housing (P) Fig.. IP IP IP IP IP IP Nominal number of housing tatic destruction strength of thick section pillow block type housing (IP) 4

48 trength of housing C E E tatic destruction strength kn 4 4 PH Direction Direction Direction C Direction E tatic destruction strength kn F Direction Direction E PH4 PH PH Nominal number of housing PH F4 F F F Nominal number of housing F F Fig..4 tatic destruction strength of higher centerheight pillow block type housing (PH) tatic destruction strength kn FX Direction Direction E FX FX FX FX4 FX Nominal number of housing tatic destruction strength kn 4 4 F Direction Direction E F F F F F F Nominal number of housing Fig.. tatic destruction strength of square-flanged type housing (F) 4

49 E tatic destruction strength kn 4 4 FL Direction Direction E tatic destruction strength kn 4 4 TX T T FL4 FL FL FL Nominal number of housing FL Q4 Q Q Q Q Q Q Q Nominal number of housing tatic destruction strength kn 4 FLX Direction E Direction Fig.. tatic destruction strength of take-up type housing (T) FLX FLX FLX FLX FLX FLX Nominal number of housing tatic destruction strength kn FL Direction Direction E FL FL FL FL FL Nominal number of housing FL Fig.. tatic destruction strength of rhombic-flanged type housing (FL) 4

50 trength of housing. trength of steel housing The precisely pressed steel housing is highly rigid, but great deformation occurs when load is applied until it is broken. Thus, allowable load of the pressed steel housing must be the value deformation of the housing caused by load does not influence on actual use. Table. shows the allowable load of the pressed steel housing. Table. Load direction Radial xial llowable load of pressed steel housing (recommended) llowable load of pressed steel housing pprox. / of basic dynamic radial load rating of bearing (Cr) pprox. / of basic dynamic radial load rating of bearing (Cr).4 trength of compact series housing The compact series housing is made of zinc alloy diecast, but great deformation occurs when load is applied until it is broken. Table.4 shows safety factor for zinc alloy die-cast, and Fig.. and. show the outline values of the static destruction strength of the zinc alloy die-cast housing. Table.4 afety factor of zinc alloy die-cast products Property of load afety factor of die-cast products tatic load With vibration With impact. trength of stainless steel housing To find the allowable load of a stainless steel housing, use the static destruction strength of a housing, taking safety factor into consideration. Table. shows the safety factors for stainless steel products. s for the basic values of the static destruction strength of PH, PH, FH,FLH, TH type housings, apply P of Fig.., P of Fig.., F of Fig.., FL of Fig.. and T of Fig... For the basic values of the static destruction strength of the P and FL type housings, see P of Fig.. and FL of Fig.. and multiply them by. respectively. Table. afety factor of stainless steel products Property of load afety factor of stainless steel products tatic load With vibration With impact tatic destruction strength kn Fig.. P P P C E P4 P Direction Direction C Direction E Nominal number of housing tatic destruction strength of compact housing (P) E tatic destruction strength kn FL FL Direction Direction E FL FL4 FL Nominal number of housing 4 Fig.. tatic destruction strength of compact housing (FL)

51 Design of shaft and base. Design of shaft For intrinsic performance of a ball bearing unit and maintenance of it for a long time, selection of the shaft optimal for operating conditions is important. Use the shaft with enough rigidity but free from bend, scratch, or burr... Tolerance of shaft () Tolerance of shaft used for cylindrical bore bearing with set screws For the cylindrical bore bearing with set screws, use the shaft of the tolerance class leading to relatively loose fitting to simplify the mounting procedures. The fitting clearance between the bearing inner ring and the shaft should be decreased as the rotational speed of the shaft is increased. Table. shows the guideline for the tolerance class of the rotational speed of the cylindrical bore bearing with set screws and the shaft used. If the cylindrical bore bearing with set screws is exposed to heavy load (Pr / Cr >.), vibration, or impact, use shaft of the tolerance class leading to relatively tight fitting to prevent creep or fretting to be occurred to the fitting surface of the bearing inner ring and the shaft. To use tight fitting of the cylindrical bore bearing with set screws, see Table. showing the guideline for the tolerance class of the shaft used. Table. shows the recommended deviation from circular and cylindrical forms of the shaft used. Table. Tolerance of shaft used for cylindrical bore bearing with set screws (recommended) (clearance fitting or transition fitting) Unit : μm haft diameter Tolerance of shaft (mm) j h h h over up to upper lower upper lower upper lower upper lower pplicable rotational speed dn ) Over Over, up to Over, up to Note ) dn = d (bearing bore, mm) n (rotational speed, min ) up to Table. Tolerance of shaft used for cylindrical bore bearing with set screws (recommended) (transition fitting or interference fitting) Unit : μm haft diameter Tolerance of shaft (mm) k k m over up to upper lower upper lower upper lower Table. haft diameter (mm) over up to Tolerance of shaft used for ball bearing units (recommended) Unit : μm Deviation from circular and cylindrical forms 4

52 Design of shaft and base () Tolerance of shaft used for bearing for blower (cylindrical bore with set screws) In the bearing for blower (special code ), smaller internal clearance of bearing (C) and once-class-higher bearing tolerance reduce vibration and noise during highspeed rotation. Therefore, use of the shaft in the tolerance class shown in Table.4 as the bearing for blower (cylindrical bore with set screws) used is recommended. Table.4 Tolerance of shaft used for bearing for blower (cylindrical bore with set screws) (recommended).. Dimensions of shouldered shaft When using the cylindrical bore bearing in the environment exposed to a great axial load, excessive vibration, or impact, adopt the shouldered shaft, and tighten the bearing inner ring with the nut. Table. shows the shoulder diameter and the fillet radius of the shouldered shaft. Table. houlder diameter and fillet radius of shouldered shaft (recommended) Unit : μm haft diameter Tolerance of shaft (mm) h j over up to upper lower upper lower a r a () Tolerance of shaft used for tapered bore bearing (with adapter) ince the tapered bore bearing is fixed to a shaft with the adapter, the shaft in the tolerance class allowing relatively loose fitting should be selected, for easier mounting. Table. shows the tolerance of shaft used for the tapered bore bearing (with adapter). Table. Tolerance of shaft used for tapered bore bearing (with adapter) (recommended) Unit : μm haft diameter Tolerance of shaft (mm) h h over up to upper lower upper lower (4) Tolerance of shaft used for cylindrical bore bearing with eccentric locking collar s for the cylindrical bore bearing with eccentric locking collar, if the fitting clearance between the bearing inner ring and the shaft is great, the shaft may be installed with being tilted because of its structure. Therefore, for cylindrical bore bearing with eccentric locking collar, use of the shaft in the same tolerance class (h or j) as that used with the bearing for blower (special code ) is recommended (see Table.4). Unit : mm Nominal UC, UCX UC ore bearing dia. houlder bore dia. Fillet radius houlder Fillet radius No. dia. dia. d da ra (max.) da ra (max.)

53 .. Countermeasures against heat In general, two or more ball bearing units are used for a shaft. If installation distance for the ball bearings is small or expansion and contraction of the shaft due to temperature are a little, install each of the bearing unit to the fixed side. However, if installation distance is great and the shaft is exposed to heat, the shaft to be installed should be positioned with a bearing unit to be on the fixed side, and another bearing unit should be installed with it to be on the free side. ecause, if the shaft is exposed to heat, it is expanded in the axial direction, leading to a great axial load to the bearing, and it causes premature breakage of the bearing. Therefore, expansion of the shaft is absorbed by the bearing unit on the free side. Equation (.) shows the relation of temperature increase to expansion of the shaft. = α t l (.) Whereas, : Expansion of shaft mm α : Linear expansion coeffi cient of shaft in the case of standard steel ~ t : Temperature increase ºC l : Installation distance of unit mm () Installation with full dog point set screw on the free side If the shaft is exposed to heat and expanded in axial direction, the bearing unit must be installed so that it or the shaft can freely move in axial direction. If the rotational speed is relatively slow, provide the shaft with key groove, attach the full dog point set screw (special code G) to the bearing, and use it as the free side unit. Fit the tip on the dog point of the set screw to the key groove on the shaft to guide the move of the shaft in axial direction. Fig.. shows the structure example of bearing unit with key groove on shaft and full dog point set screw and use as free side unit. Table. shows the dimensions of key groove for the full dog point set screw. If a bearing unit is used as the free side bearing unit by adopting this method, h is recommended as the tolerance class of the shaft to be used. If temperature of the shaft is higher than that in the bearing, the shaft in the tolerance class allowing a greater fitting clearance must be used. If a bearing unit is used as the free side unit by adopting the above method, fretting corrosion may occur to the fitting surface between the bearing inner ring and the shaft. In order to prevent fretting corrosion, application of grease onto the bore surface of the bearing when the bearing unit is installed. Countermeasures against great expansion of shaft as a result of exposure to heat are shown below. Full dog point set screw Fig.. Use on free side with full dog point set screw Table. Dimensions of key groove for full dog point set screw (use on free side) J K Full dog point set screw Nominal size of set screw Dimensions of key groove pplicable nominal bearing number (mm) J K (Min.) UC UCX UC M. 4 X, M XX M.. XX, M. XX 4 M4. X, M. X M. 4 M., llowable tolerance of key groove dimension K (Recommended value : ~+.)

54 Design of shaft and base () Use of cartridge type unit on free side In the environment the rotational speed is relatively high or the bearing unit is exposed to vibration, use of the cartridge type unit as the free side unit and move of the bearing unit between the mounting bore on a machine and the outside surface of the housing in axial direction are recommended. Fig.. shows the example of structure of the cartridge type unit as the free side unit... Mounting bore of cartridge type unit The cartridge type unit is directly fit to the cylindrical bore of the base. Under the standard operating conditions, select H as the tolerance class of cylindrical hole on the base that the cartridge type unit is to be installed. For such purposes that the shaft and the bearing inner ring are hot, select G as the tolerance class of cylindrical bore on the base. In the environment the bearing unit is exposed to vibration or impact, selection of the tolerance class allowing smaller fitting clearance between the cylindrical bore of the base and the bearing unit is recommended. Table. shows the tolerance of cylindrical bore of the base that the cartridge type unit is to be installed. Table. Tolerance of cylindrical bore for mounting cartridge type unit (recommended) Unit : μm Fig.. Use of cartridge type unit on free side If a ball bearing unit is exposed to heat, countermeasures against expansion of the shaft in axial direction as well as calculation of decrease in the internal clearance of the bearing to select the internal clearance of the bearing appropriately (see Operating temperature and bearing specifications ).. Design of base.. Rigidity of base and flatness of mounting surface If rigidity of the base that a ball bearing unit is to be installed is low or the flatness of the mounting surface is poor, vibration or abnormal noise may occur to the bearing unit during operation, leading to premature breakage or lower strength of the housing. Therefore, the base that the ball bearing unit is to be installed must have enough rigidity, and the mounting surface must be finished with accuracy allowing elimination of deformation on the bearing or housing. Fig.. shows the recommended values for flatness of the mounting surface of the base that the ball bearing unit is to be installed. Nominal bore dia. of cylindrical bore (mm) Tolerance of cylindrical bore H G over up to upper lower upper lower Dimensions relative to installation of take-up type unit The take-up type unit is incorporated between the two guide rails on the base side, and enables adjustment of the support position with the shaft center by the adjuster bolt. Table. shows the dimensions of the guide rail, adjuster bolt, and round nut to install the take-up type unit to the base. L L Max. : L / mm Fig.. Flatness of mounting surface of base (recommended)

55 Table. Dimensions relative to installation of take-up type unit (recommended) r H H r±. ud Tapered pin Nominal housing No. T4 T T T Dimensions of guide rail r Hr H (Reference) Unit : mm Dimensions of adjuster bolt and round nut d D 4 4 T T T 4 4 T 4 T T T4 T 4 T 4 4 T 4 4 TX TX 4 TX TX TX 4 4 TX 4 TX TX TX TX4 4 TX 4 TX TX 4 4 Nominal housing No. Unit : mm Dimensions of adjuster Dimensions of guide rail bolt and round nut H r Hr d D (Reference) T T 4 T 4 T 4 4 T T 4 T 4 T 4 T T4 4 4 T 4 T 4 4 T T T 4 T T 4 4 T T4 4 T 4 T 4 4. Machining dimensions of holes for housing dowel pins The pillow block type, square-flanged type, and rhombicflanged type housing have the dowel pin seat. If accurate positioning of the housing is required, install it with the dowel pin. s for the position of the pin for fixing the housing and pin diameter, see the upplementary at the end of this catalogue.

56 Tolerances and internal clearance Tolerances and internal clearance Tolerances of a ball bearing unit is specified in JI (ball bearing for ball bearing unit) and JI (housing for ball bearing unit). JTEKT produces products conforming to these standards.. Tolerances of bearing Table. to Table.4 show the tolerance of a ball bearing for ball bearing unit. all bearings for blower unit (special code ) are produced with higher accuracy than standard types (see Table.). Table. shows the permissible values for chamfer dimensions of cylindrical bore bearing inner ring. C C Table. Nominal bearing outer dia. D (mm) Tolerances and permissible values of outer ring of ball bearing for ball bearing unit Mean outside diameter deviation Dm Unit : μm Radial runout of assembled bearing outer ring Kea over up to upper lower max. 4 4 [Remark] Values in Italics are prescribed in JTEKT standards. C ud ud ud UC UK N C C C C C ud ud ud ud ud U ER R Table. Tolerances and permissible values of inner rings of ball bearings for ball bearing units Nominal bearing bore dia. d (mm) ingle plane mean bore diameter deviation ingle plane bore diameter variation eccentricity deviation of eccentric surface of inner ring and eccentric locking collar ingle inner (outer) ring width deviation Unit : μm Radial runout of assembled bearing inner ring dmp Vdsp Hs s (Cs) Kia over up to upper lower max. upper lower upper lower max [Remark] Values in Italics are prescribed in JTEKT standards.

57 Table. Tolerances and permissible values of inner ring of ball bearing for blower unit () Table.4 Tolerances and permissible values for tapered bore of bearing Nominal bearing bore dia. d (mm) ingle plane mean bore diameter deviation dmp ingle plane bore diameter variation Vdsp Unit : μm Radial runout of assembled bearing inner ring over up to upper lower max. max. ) Note ) mm should be incled in this category. Kia α Theoretical tapered bore u(d + dmp) α dmp dmp u(d + dmp) Tapered bore with single plane mean bore diameter deviation Unit : μm Nominal bearing bore dia. d, mm dmp dmp dmp Vdsp ) over up to upper lower upper lower max Note ) To be applied to all the radial planes of tapered bore [Remarks]. pplicable range pplicable to tapered bore of inner ring of tapered bore radial bearing that standard value of taper ratio is. mount code d : tandard diameter at theoretical large end of tapered bore d = d + dmp : ingle plane mean bore diameter deviation at theoretical small end of tapered bore dmp : ingle plane mean bore diameter deviation at theoretical large end of tapered bore Vdsp : ingle plane bore diameter variation (a tolerance for the diameter variation given by a maximum value applying in any radial plane of the bore) : Nominal inner ring width α : of nominal tapered angle of tapered bore α = º '.4" =. 4º =.4 4 rad

58 Tolerances and internal clearance Table. Permissible values for chamfer dimensions of inner ring of bearing with cylindrical bore r (Minimum) earing bore surface (xial direction) ide of inner ring Radial direction : r (Min.) : r (Max.) Unit : mm r (Min.) r (Max.) Radial direction xial direction Tolerances of housing s the tolerance of the housing for a ball bearing unit, tolerance of the diameter of spherical bearing seat fit to the bearing, and tolerance and permissible value of dimensions relative to installation of the housing are specified. Table. shows the tolerance of diameter of the spherical bearing seat of housing. Usually, select tolerance class J that allows transition fitting of the housing and the bearing. If priority should be given to operability in installation to a machine, select tolerance class H allowing clearance fitting. The unit conforming JI of tolerance class H is equipped with the detent to the outer ring to prevent turning of the outer ring. If rotating outer ring load occurs or the bearing is rotated while the shaft is stopped, select the tolerance K allowing interference fit. Fig.. shows the representative example of dimensions relative to installation of the housing with tolerance and permissible value. Respective dimensional tables show the tolerance and permissible values of dimensions relative to installation of the housing. [Remark] There shall be no specifi cation for the accuracy of the shape of the chamfer surface, but its outline in the axial plane shall not be situated outside of the imaginary circle arc with a radius of r min or r min which contacts the inner ring side face and bore, or the outer ring side face and outside surface. Table. Tolerances of spherical bearing seat diameter of housing Unit : μm ud a Nominal dia. of spherical bearing seat Da (mm) Tolerance class H Deviation of spherical bearing seat dia. Dam Tolerance class J Deviation of spherical bearing seat dia. Dam Tolerance class K Deviation of spherical bearing seat dia. Dam over up to upper lower upper lower upper lower [Remark] JTEKT generally applies class J to housing designs. Class H and class K can also be applied depeding on the application.

59 Fig.. Dimensions relative to installation of housing with tolerance and permissible value (representative example) Pillow block type housing Take-up type housing X H H u N H Frame for take-up type unit J J J Flange type housing J 4u N u X M J Cartridge type housing Y J uh 4u N u X M Y Table. shows standard tolerance of cut or cast portions not specified in this catalogue. uh J Table. tandard tolerance not specified respectively [Remark] Respective tolerances and permissible values for housing are shown in dimensional tables. Item tandard No. Class Cutting JI 4 Medium Casting of cast iron JI 4 tandard Casting of cast steel JI 4 tandard

60 Tolerances and internal clearance. earing internal clearance all bearing internal clearance for ball bearing unit is specified by the move at the time the inner ring or outer ring is moved in the radial direction (radial internal clearance). Value of internal clearance during operation (to be called operation clearance) gives a great influence on rolling fatigue life of the bearing, heat, noise, and vibration. If the bearing inner ring is installed to the shaft with interference, the internal clearance of bearing must be fixed taking expansion of the bearing inner ring into consideration. If transmission heat to the shaft is high or hot steam runs through the hollow of the shaft, calculate the decrease of internal clearance, and appropriately select the internal clearance of bearing (see Operating temperature and bearing specifications ). Table. shows the internal clearance applicable to specifications of ball bearing for Koyo all earing Unit, and Table. shows the standard values of bearing internal clearance. Table. Type Internal clearance applicable to types of ball bearing for ball bearing unit pplicable internal clearance earing with cylindrical bore earing with tapered bore tandard type CN C tainless steel type C Heat resistant type (special code : DK) C4 C Cold resistant type (special code : DK) CN C High speed type (special code : K) CN C For blower (special code : ) C C [Remark] For the bearings that the internal clearance in this table is applied, no clearance code is indicated. Table. tandard values for internal clearance of ball bearing for ball bearing unit Unit : μm Nominal bearing Internal clearance bore dia. d (mm) C CN GN C C4 C over up to lower upper lower upper lower upper lower upper lower upper lower upper [Remarks]. Radial internal clearance in this table conforms to JI (ball bearing for ball bearing unit).. Increase in radial internal clearance generated by measured load conforms to the table below. maller correction of C clearance is applicable to the lower clearance, while larger correction is applicable to the upper clearance. Nominal bearing bore dia. d (mm) Measured load Correction of clearance Unit : μm over up to N C CN GN, C C4 C

61 Materials. Materials of bearing all bearings for ball bearing unit are made of the following materials : bearing rings (outer and inner rings) and rolling elements (balls) are made of steel, and cages are made of pressed steel. These bearing materials need the features shown below. () Higher elastic limit is required, since high contact stress occurs partially. () Higher rolling fatigue strength is required, since great contact load occurs repeatedly. () uperior hardness (4) uperior wear resistance () uperior toughness against impact load () uperior stability of dimensions s the material of bearing rings (outer and inner rings) and rolling elements (balls) of the ball bearing for Koyo all earing Unit, high carbon chromium bearing steel specified in JI is used. For more reliability of bearing, vacuum degassing is executed against high carbon chromium bearing steel to reduce non-metallic inclusion and incled oxygen. fter the materials of bearing are made into the specified form, quench-and-temper is executed until its hardness is HRC. Table. shows the chemical components of high carbon chromium bearing steel. s the material of bearing rings and rolling elements of the ball bearings for stainlessseries unit (special code : ), stainless steel with superior corrosion resistance is used. Cages are made of coldreduced carbon steel sheets and strips specified in JI. Table. shows the chemical compositions of coldreduced carbon steel sheets and strips specified in JI.. Materials of housing housing for ball bearing unit is mainly made of gray iron casting products, carbon steel casting products, structural steel, cold-reduced carbon steel sheets and strips. Gray iron casting is the most popular as the material of housing for ball bearing unit, featuring absorption of vibration, damping superior to other materials, easy and varied forming by casting, appropriate strength, and excellent heat property. Table. shows the mechanical properties of gray iron casting. If superior strength is required for the housing for ball bearing unit, select carbon steel casting products with higher rupture strength, carbon steel casting, or general structural rolled steel with higher strength against impact. For the material of housings of the compact series unit, zinc alloy die-cast is used, and corrosion-resistant cast steel products are used for housings of the stainless series unit. Cold-reduced carbon steel sheets and strips are used as the material of housings for the pressed steel unit. Table.4 to. show the mechanical properties of these housing materials. pheroidal graphite iron casting (FCD4- of JI G ) may be used, as well as these materials. Table. Chemical compositions of high carbon chromium bearing steel (JI G 4) Code UJ UJ Chemical components (%) C i Mn P Cr Mo or less or less or less. or less or less or less. or less Table. Chemical compositions of cold-reduced carbon steel sheets and strips (PCC) (JI G 4) Code PCC PCD Chemical components (%) C i Mn P Ni Cr. or less. or less. or less. or less. or less.4 or less. or less. or less Table. Mechanical properties of gray iron casting (FC) (JI G ) Type code FC Tensile strength N/mm or more Hardness H or less

62 Materials Table.4 Mechanical properties of general structural rolled steel (4) (JI G ) Type code Yielding point or bearing force N/mm Thickness of steel mm incl. Over incl. 4 Over 4 Tensile strength MPa Thickness of steel mm Tensile test piece Elongation % ending angle endability Inside dia. Test piece 4 4 or more or more or more 4 Over, max. Over, 4 max. Over 4 No. No. No.4 or more or more or more º. times of thickness No. Table. Code Mechanical properties of zinc alloy die-cast (ZDC) (JI H ) (Reference) Tensile strength Impact Elongation Hardness MPa % MJ/m H ZDC.4 Table. Type code C C4 Table. Mechanical properties of corrosionresistant cast steel (C) (JI G ) earing force Tensile strength Elongation Hardness MPa MPa % H or more or more or more or more or more or more or more or less Mechanical properties of coldreduced carbon steel sheets and strips (PCC) (JI G 4) Type code Tensile strength Elongation MPa % PCC or more 4 or more PCD or more or more Table. Mechanical properties of ductile cast iron (FCD4-) (JI G ) Type code Tensile strength Elongation N/mm % FCD 4 or more or more. Materials of parts and accessories Table. shows materials of parts and accessories of a ball bearing unit. Table. Materials of parts and accessories of ball bearing units Designations Materials Code Oil seal (standard type) Oil seal (heat resistant, cold resistant) Flinger (slinger) tainless steel Flinger (slinger) Pressed steel cover Pressed stainless steel cover Cast iron cover Hexagon socket set screw tainless steel hexagon socket set screw dapter sleeve for bearing Lock nut for bearing Washer for bearing Eccentric locking collar Grease nipple tandard code Nitrile rubber NR ilicone rubber VMQ Cold-reduced carbon steel sheets and strips Cold rolled stainless steel plate and steel strip Cold-reduced carbon steel sheets and strips Cold rolled stainless steel plate and steel strip Gray casting iron products Chrome molybdenum steel PCC JI G 4 U4-CP, U4-C JI G 4 PCD JI G 4 U4-CP, U4-C JI G 4 FC JI G CM4 JI G 4 tainless bar steel U4 JI G 4 Mechanical structural carbon steel Mechanical structural carbon steel Cold-reduced carbon steel sheets and strips Mechanical structural carbon steel Copper and copper alloy rod C JI G 4 C JI G 4 PCC JI G 4 C JI G 4 UM4L JI G

63 Performance. Friction torque of bearing Friction torque of a ball bearing for ball bearing unit is the synthesis of rolling friction between the rolling elements (balls) and the bearing rings (outer and inner rings), sliding friction between the rolling elements and the cages, agitating resistance of lubricants, and friction resistance of oil seal. Greatness of friction torque is influenced by the type, dimensions, load, and rotational speed of bearing, and lubricating conditions. For the ball bearing unit, oil seals with especially superior dustproof performance are adopted to improve sealing performance of the bearing. Thus, friction resistance of the oil seal greatly depends on the friction torque of the bearing. Friction torque of the ball bearing for ball bearing unit can be found by the Equations below. M = Mp + Mk (.) d Mp = l P (.) Whereas, M : Friction torque of bearing mn m M p : Friction torque of sections changed by load mn m M k : Friction torque of sections changed by rotational speed mn m l : Friction coeffi cient (. to.) P : Load applied to bearing N d : Nominal bearing bore dia. mm Note that the agitating resistance of lubricants and the friction resistance of oil seal are difficult to be calculated, since they are fluctuated by rotational speed. Fig.. shows the result of measurement of friction torque of the typical ball bearing unit. Friction torque mn m 4 Fig.. UC UC UC4 t startup Rotational speed min Example of measurement result of ball bearing unit. Increase in temperature of bearing Increase in temperature of the ball bearing for ball bearing unit is indicated as heat energy converted from the friction torque in the bearing during operation. Temperature of the bearing during operation increases in proportion to the greatness of friction torque and rotational speed (friction torque increases in proportion to the greatness of load). Increase in temperature of the ball bearing for ball bearing unit depends on the heating value generated by friction in the bearing and that discharged outside from the surface of the bearing and housing. Therefore, increase in temperature of the ball bearing for ball bearing unit is influenced by the environmental conditions of the location that the ball bearing unit is installed (quality of heat radiation environment). Temperature of the ball bearing unit is increased gradually after the startup of operation, and reaches the maximum level after one or two hours, if no abnormality occurs. Then, it is decreased a little, and enters the steady-state (see Fig..). In this manner, if the operating conditions are not changed, bearing temperature is virtually constant, and therefore, measurement of temperature and assumption of the status of bearing are enabled. Increase in temperature ºC Fig.. Pillow block type unit UCPJ Rotational speed : min Radial load kn Radial load kn Operating time h Example of temperature measurement during operation of pillow block type unit Increase in temperature during operation of the ball bearing unit depends on the type of oil seal used for the bearing as well as friction torque. Increase in temperature of the triple-lip seal type (supplementary code L) is greater than the standard type, and that of the non-contact seal type (special code K, ) is smaller than the standard type. The bearing units for high speed and blower are equipped with the non-contact type oil seals for high speed use and reduction of heat, vibration, and noise.

64 Performance. Dustproof and waterproof performance JTEKT executes various tests to check dustproof and waterproof performance of the ball bearing unit. Representative test results are shown below... Dust sprinkle rotating test (dust preventive performance) Use the drum type dust sprinkle rotating test machine for this test. Directly sprinkle dusts onto the ball bearing unit while it is being operated, and then, jge the dust preventive performance of the product. UCFL (standard type) UCFLC (unit with cover) UCFLL (triple-lip seal unit) Fig.. Rotational speed : 4 min Load : elt tension only Dust : lumina powder ( meshes) Lubrication : No grease is supplied during operation (h) Example of result of dust sprinkle rotating test (dust preventive performance) In the case of the standard type, abnormal noise occurred about hours after operation was started, and ingress of dusts was recognized. On the other hand, no abnormality was found in the triple-lip seal type (supplementary code L) and the covered type (supplementary code C) even after about hours after operation was started, and superior dust proof performance was recognized... Dust bury rotating test (dust preventive performance) ury the ball bearing unit into dusts, and run it with the impeller installed to the shaft while stirring dusts, and jge the dust preventive performance of the product. This test is executed under the severest conditions among the operating conditions of the ball bearing unit. UCP (standard type) UCPC (unit with cover) UCPL (triple-lip seal unit) Fig..4 Rotational speed : 4 min Load : elt tension only Dust : GC powder ( meshes) Lubrication : No grease is supplied during operation (h) Example of result of dust bury rotating test (dust preventive performance) In the case of the standard type, abnormal noise occurred about hours after operation was started, and ingress of dusts was recognized. On the other hand, no abnormality was found in the triple-lip seal type (supplementary code L) and the covered type (supplementary code C) even after about hours after operation was started, and superior dust preventive performance was recognized... Waterproof performance test In this test, water is splashed directly impellers installed on the shaft. UCP (standard type) UCPC (unit with cover) UCPL (triple-lip seal unit) Fig.. Rotational speed : min Load : elt tension only Water : Tap water (h) Example result of waterproof performance test In the case of the standard type, rust was found on the balls and raceway surface (outer and inner rings) about hours after operation was started. On the other hand, rust of equal level to the standard type was found in the triple-lip seal type (supplementary code L) and the covered type (supplementary code C) after about hours after operation was started.

65 4 Handling The most significant feature of the ball bearing unit is simplicity of handling and installation. However, if handling or installation is wrong, premature breakage may occur to the ball bearing unit. Therefore, handle and install it appropriately for genuine performance of the ball bearing unit. The standard Koyo all earing Unit is equipped with the ullet Point set screw featuring secure tightening to shaft. Other set screws are also available depending on your purposes and operating conditions (see Table 4.). Table 4. et screw of ball bearing for unit 4. Installation 4.. Installation of unit with set screws When installing the unit to the shaft with the set screws, it is enough to tighten the two set screws of the bearing inner ring with the specified torque. However, if the environment is exposed to impact or vibration, the shaft is rotated in normal and reverse directions, or the machine is started and stopped frequently and repeatedly, grind the surface of the shaft where the set screw contacts with a file so that the flat seat (Fig. 4.) or drilled seat (Fig. 4.) is provided. It improves the tightening effect of the set screw substantially. Designations (code) ullet Point (no indication) * ullet Point is developed by NIPPON PILLOW LOCK CO., LTD. (FYH). Pointed (G4) Details The tip of the ullet Point setscrew has a ball shape, and it is designed to fi rmly grip the shaft by expanding its threads outward against the threads of the inner ring of the bearing as it is tightened. When shock or vibration are problems, the ullet Point setscrew can remain affixed to the shaft longer than other set screw styles incling double point, ball point, or others. The cone point set screw has a º angle and fi ts a drilled cone seat in the shaft. It allows correct positioning on the shaft and prevents shaft movement in an axial direction. Fig. 4. Flat seat provided for shaft (for improvement in set screw tightening effect) Full dog point cap (G) The full dog point set screw fits into the key groove in the shaft and allows for expansion and contraction of the shaft. º Fig. 4. Drilled seat provided for shaft (for improvement in set screw tightening effect) If the environment is exposed to a great axial load or excessive vibration, use the shouldered shaft, and tighten the bearing inner ring with the nut (Fig. 4.). s for the dimensions of the shouldered shaft, see Design of shaft and base. houldered shaft Fig. 4. haft nut Example of installation with using shouldered shaft and nut Procedures for installation of the ball bearing unit with set screw are shown below. () Inspect the unit to ensure that the rigidity of the base, flatness of the mounting surface, variation of tolerance of the shaft meet the standards. Check for bend, flaw, or birr on the shaft. () Make sure that the tip of the set screw does not exceed the bearing bore diameter surface. () Fit the bearing unit to the shaft, and place it to the specified position. To fit it to the shaft with tight fitting, press-fit the bearing unit to the shaft with a press, coldfit by cooling the shaft, or shrink-fit the bearing unit by warming it with air bath ( ºC or less). void hitting the side of the bearing inner ring with a hammer to press-fit the bearing to the shaft. (4) Place the bearing unit to the specified position on the base, and fix it with bolts (Fig. 4.4). Tighten the mounting bolt of the housing with the specified torque by a torque wrench. s for the tighten-

66 4 Handling ing torque of the mounting bolt, see the upplementary table at the end of this catalogue. Fig. 4.4 Fixing ball bearing unit to base () Tighten the set screws (two) of a bearing inner ring with the specified tightening torque evenly (Fig. 4.). s for the tightening torque of the set screw, see the upplementary table at the end of this catalogue. Procedures for installation of the ball bearing unit with adapter assembly are shown below. () Inspect the unit to ensure that the rigidity of the base, flatness of the installing surface, and variation of tolerance of the shaft meet the standards. Check for bend, flaw, or birr on the shaft. () Fit the adapter sleeve to the shaft, and move the adapter sleeve to the installing position of the bearing unit. If the fitting is too tight to insert the adapter sleeve, put a screwdriver into the cutout of the adapter sleeve, and expand the cutout for easier fitting. () Fit the bearing unit to the shaft. Then, place the cylindrical backing plate to the whole side of the bearing inner ring that the locknut is to be attached, and tap all around the large diameter side end face to fit the bore diameter surface of the bearing inner ring to the tapered surface of the adapter sleeve closely (Fig. 4.). acking plate Fig. 4. Fitting adapter sleeve to bearing with tapered bore Fig. 4. Tightening of set screw () Turn the shaft with your hands, and tighten the set screws (two) of another bearing inner ring with the specified torque. () t last, turn the shaft with your hands, and check for abnormality in turning status of the bearing. 4.. Installation of unit with adapter To install the bearing with tapered bore to the shaft, set the adapter assembly (sleeve, locknut and washer) between the bearing bore diameter and the shaft. The bearing can be securely fixed even in the environment exposed to excessive vibration or impact. If tightening of the locknut is loose, fitting to the shaft may be loosened during operation, and slippage occurs to the fitting surface, leading to wear on the shaft or parts. On the contrary, if tightening of the locknut is excessive, the bearing inner ring is expanded, and internal clearance of the bearing is too small, causing abnormal heat or premature breakage. Therefore, pay close attention to installation of the bearing with adapter. (4) Fit the washer and locknut to the adapter sleeve, and tighten the locknut with your hands. () Place the bearing unit to the specified position of the base, and fix it with the bolts. Tighten the mounting bolt of the housing with the specified torque by a torque wrench. s for the tightening torque of the set screw, see the upplementary table at the end of this catalogue. () Tighten the locknut of the adapter. When tightening the locknut, tighten it with a wrench for tightening, or place a jig onto the cutout of the locknut outer surface, and tap the jig with a hammer and turn the locknut by to / turn (Fig. 4.). s for the tightening torque of the locknut, see the upplementary table 4 at the end of this catalogue. 4

67 ince the rotating force of the shaft increases the tightening force of the eccentric ring to the shaft, the unit with eccentric locking collar allows secure fixing of the bearing (Fig. 4.). Fig. 4. Tightening locknut () For the pillow block type unit, loosen the mounting bolts on a housing, adjust the position of the bearing unit in the axial direction while turning the shaft by your hands, and then, tighten the mounting bolt on the housing with the specified torque again. () For the flange type unit, positions of the bearing and housing in the axial direction must be fit completely. Therefore, pay close attention and tighten the locknut to prevent any error of the position of bearing inner ring. () end the outer tab on a washer that fits to the position of cutout on the outer surface of the locknut, and lock the locknut (Fig. 4.). Fig. 4. all bearing unit with eccentric locking collar Procedures for installation of the ball bearing unit with eccentric locking collar are shown below. () Inspect the unit to ensure that the rigidity of the base, flatness of the mounting surface, and variation of tolerance of the shaft meet the standards. Check for bend, flaw, or birr on the shaft. () Fit the bearing unit to the shaft, and place it on the specified position. () Install the bearing unit to the specified position of the base, and fix it with the bolts. Tighten the mounting bolts for the housing with the specified torque with a torque wrench. For the tightening torque of the mounting bolt, see the upplementary table at the end of this catalogue. (4) Fit the eccentric section of the bearing inner ring to the eccentric recessed section provided on the eccentric locking collar, turn the eccentric locking collar in the shaft turning direction, and tighten the set screw of the eccentric locking collar with the specified torque (Fig. 4.). For the tightening torque of the set screw, see the upplementary table at the end of this catalogue. Fig. 4. ending outer tab of washer (Locking locknut) () t last, turn the shaft with your hands, and check for abnormality in the rotating status of the bearing. 4.. Installing unit with eccentric locking collar When installing the bearing to the shaft with the eccentric ring, fit the eccentric section of the end outside surface of the bearing inner ring to the eccentric recessed section provided on the eccentric locking collar, turn the eccentric locking collar, and tighten the set screw of the eccentric locking collar to fix the bearing to the shaft. Fig. 4. Installing eccentric locking collar

68 4 Handling () Turn the shaft with your hands. Then, fix the eccentric locking collar of another bearing unit to the bearing inner ring, and tighten the set screw of the eccentric locking collar with the specified torque. () t last, turn the shaft with your hands, and check for abnormality in the rotating status of the bearing Installing unit with cover Covers for ball bearing unit are available in two types, pressed steel and cast iron. Install both the covers at last after installation of the bearing and housing is complete. Procedures for installation of the ball bearing unit with cover are shown below. () pply grease all around the seal lip of the cover, and pack the internal space of the cover with grease (approximately / to of the space capacity) (Fig. 4.). Fig. 4. Installing steel plate cover Pack grease (4) When installing the cast iron cover, fit the cover to the cover groove of the housing, and fix it with the bolt. For the tightening torque of the cast iron cover mounting bolt, see the upplementary table at the end of this catalogue. () Install another cover to the housing in a similar manner. () Check for abnormality of the installed cover. () t last, turn the shaft with your hands, and check for abnormality in the rotating status of the bearing. Fig. 4. Packing grease in internal space and seal lip of cover 4. Test run inspection fter installation of the ball bearing unit is complete, execute the test run inspection to ensure that it is done appropriately. The test run inspection should be executed by following the procedures below. Check for abnormality in the bearing unit. () Turn the shaft with your hands, and make sure that the bearing is rotated smoothly. If any jam, vibration, great rotation torque (heavy), or uneven rotation is found, the bearing is jged to be faulty. () Execute power run with no load and at a low speed, and check for abnormal noise and vibration. () Carry out power run under the specified conditions, and check for abnormal noise, vibration, and temperature increase. Table 4. shows the main faults that may occur during the test run inspection of the ball bearing unit and causes. () Put a cover through the shaft, and then, fit the bearing unit to the shaft. () Fit the cover through the shaft to the cover groove on the housing, and fix it. (4) For the pressed steel cover, tap all around the cover evenly with a synthetic resin hammer to prevent deformation, and install it to the housing (Fig. 4.). To remove the pressed steel cover, put a screwdriver into the groove on the periphery of the cover, and slightly pry it.

69 Table 4. Main faults occurred during test run inspection and their causes Table 4. Main faults found during periodic inspection and their causes Faults Excessively great torque, uneven rotating torque bnormal noise, abnormal vibration bnormal temperature increase Causes () Faulty installation, leading to preload onto bearing in axial direction () Inappropriate handling or installation, leading to interference of oil seal with flinger (slinger) () Excessive tightening of locknut (adapter), leading to too small internal clearance of bearing () Insuffi cient tightening of set screw of bearing inner ring or mounting bolt of housing () Excessively large internal clearance of bearing () end on shaft, deviation of shaft center of shouldered shaft (4) Faulty accuracy of shaft () Insuffi cient rigidity or faulty fl atness of base () Excessively small internal clearance of bearing () Inappropriate installation, leading to preload onto bearing in axial direction () Great load applied (4) llowable rotational speed is exceeded () Faulty fl atness of base () Inappropriate handling or installation, leading to interference of oil seal with flinger (slinger) 4. Periodic inspection Koyo all earing Units do not need to be inspected, as well as standard sealed bearings. However, for especially important purposes, periodic inspection must be executed with appropriate intervals for safe operation of the bearing unit. ince a ball bearing unit cannot be disassembled for inspection of internal status, check the appearance and operating status as shown below, and ensure that the bearing unit is free from fault or not. () ppearance () Looseness of set screw of bearing inner ring or mounting bolt of housing () Vibration, noise (4) Temperature () Grease supply interval, check of supplied amount Table 4. shows the main faults found during the periodic inspection of ball bearing unit and their causes. If any fault is found in the ball bearing unit during the periodic inspection, immediately provide countermeasures against them, and carry out them. If the unit is jged to be difficult to be used, replace the bearing unit. It is important to replace the bearing unit to prevent expanding damage to other parts. Faults Excessively great torque (heavy) bnormal noise, abnormal vibration bnormal temperature increase Causes () Degraded grease () Interference of oil seal with flinger (slinger) due to excessive supply of grease () Deformation of flinger (slinger), leading to interference with oil seal (4) bnormal load due to expansion of shaft () Insufficient tightening of set screw of bearing inner ring or mounting bolt of housing () Wear on fitting surface of shaft and bearing inner ring due to creep or fretting () Ingress of foreign matters into bearing (4) Damage to raceway surface or rolling contact surface of rolling element by rolling fatigue () Dent on raceway surface or rolling contact surface of rolling element by excessive load () Excessive warp or bend of shaft () Degraded grease () Interference of oil seal with flinger (slinger) due to excessive supply of grease () Deformation of flinger (slinger), leading to interference with oil seal (4) Looseness of set screw or locknut (adapter) of bearing inner ring () bnormal load due to expansion of shaft () Damage to raceway surface or rolling contact surface of rolling element by rolling fatigue 4.4 upply of grease In Koyo all earing Unit, grease of good quality is packed with high quality oil seal. Therefore, grease life is long under standard operating conditions, and use without lubrication is enabled. If the operating temperature is high or the unit is used in the environment exposed to dusts or high humidity, grease may be degraded faster, leading to faulty lubrication in a short period. ince Koyo all earing Units are lubricated type bearings, fresh grease must be periodically supplied to the bearings, if they are used for such purposes that premature degradation of grease is expected. The ball bearing units can maintain normal lubricated status and longer service life by supplying fresh grease.

70 4 Handling 4.4. Grease life and supply intervals Grease life of a packed grease ball bearing, like a ball bearing unit, can be found by Equation (.) in page 4. It is recommended to supply grease with the intervals of to / of grease life found by the calculation shown above to ball bearing units, taking peculiarity of lubricating method and safety of bearing unit into consideration. If the bearing unit is used under severe environmental conditions, incling much dust and high humidity, the greasing intervals must be further shortened, taking these influences into consideration. If operating conditions of the ball bearing unit are not clear or the unit is operated under standard conditions, consider the greasing intervals shown in Table 4.4 as the guideline Greasing amount Initial greasing amount of Koyo all earing Unit is approximately to % of the internal space capacity of the bearing. If amount of grease supplied in the bearing is excessive, agitating resistance of grease increases, leading to abnormal heat or grease leak. DO NOT exceed the initial greasing amount. Table 4. shows the recommended values of greasing amount of Koyo all earing Unit. If the unit is used at a low speed, supply grease of double amount of that shown in Table 4. is recommended to increase dust preventive performance. [Remarks]. For greasing amount of the UK type bearing, use this table, too.. For greasing amount of the triple-lip seal type,. times of the values shown in this table are recommended.. Values shown in this table are applicable to standard grease (specifi c gravity :. g/ml). If you use greases of other specifi c gravity, adopt values converted with the same volume. Table 4. ore dia. code Greasing amount of ball bearing unit (recommended)... Greasing amount, g Diameter eries ) UC UCX UC Table 4.4 Greasing intervals of ball bearing unit (recommended) Operating temperature, ºC over up to ubstantially clean Grease Intervals Much dust Much dust and mdy water earing used ( months) not necessary year ( months) year 4 months ( month) 4 months month (Low temperature DK) ) tandard bearing months months weeks months weeks days High temperature weeks days days DK week days day Grease supplied (Lithium) Lithium Lithium Note ) Greasing intervals in parentheses are applicable to the cold resistant type (DK). [Remark] Greasing intervals shown in this table are applicable to the unit to be operated for to hours a day. If operating hour is out of this range, find the greasing interval proportionally by this table.

71 4.4. Types of grease supplied Though various types of greases used for ball bearing units are available, if dissimilar grease, especially grease of which soap base is different, is mixed, lubricating performance may be significantly degraded. Therefore, the same grease to be supplied as the initially packed grease must be used, and avoid use of dissimilar grease. It is recommended to supply the same grease to Koyo all earing Unit as the initially packed grease (see Table.). If you have no choice but to use other greases, you have to use grease of the same type (thickener) as the initially packed grease, if not the worst. If the grease supply with the grease nipple of the standard type (type ) is difficult because of the structure of the machine, grease nipples of the type or type C are also available. Contact JTEKT. Fig. 4.4 shows the types of grease nipples. Type Type (.º) Type C (º) upplying grease When supplying grease to a ball bearing unit, use the grease nipple and grease gun installed to the housing (Fig. 4.). Fig. 4.4 Types of grease nipple for ball bearing unit upplying grease When supplying many ball bearing units with the centralized lubricating device, use soft grease with consistency from about to, and provide piping appropriately so that grease of the specified amount is supplied. Piping to the ball bearing unit should be provided with the tapped hole of the grease nipple of the housing. However, if size of the tapped hole on the housing differs from that of thread of the piping, use the reducing socket. Fig. 4. shows the structure of the reducing socket for centralized lubricating. When executing centralized lubricating, it is effective for the lubricating surface of the bearing to supply grease of the amount shown in Table 4. by dividing into several times. Fig. 4. Reducing socket for centralized lubricating Fig. 4. upplying grease to ball bearing unit For details of grease nipples and reducing sockets, see Parts and accessories. () Clean the grease nipple and area around it to prevent ingress of foreign matters. () Clean the grease gun, and pack clean grease. () upply grease. When supplying grease to the ball bearing unit, turning of the shaft with your hands or turning of the bearing unit at a low speed is recommended. It allows appropriate discharge of old grease and even supply of fresh grease into the bearing.

72 4 Handling 4. Replacing bearing ince the bearings and the housings of Koyo ball bearing units are compatible, if a bearing is faulty, it can be replaced and used continuously. Replacing procedures of the bearing of the ball bearing unit are shown below. () Remove the bearing unit from the shaft and the base. () crew in the set screw so that the head of the set screw does not project out from the outside diameter surface of the inner ring of the bearing. Head of the set screw may be hooked on the housing when the bearing is tilted. () Turn the bearing by º with a handle of a hammer until the bearing is horizontal. (4) Take out the bearing from the bearing groove of the housing. To fit a new bearing to the housing, reverse the removing procedures.

73 pecification tables of ball bearing units

74 pecification tables of ball bearing units Pillow block type Pillow block type UCP (d ~ 4)... 4 NP (d ~ )... NPK (d ~ )... UKP (d ~ )... 4 Thick section pillow block type UCIP (d 4 ~ 4)... UKIP (d ~ )... Tapped-base pillow block type UCP (d ~ )... 4 Higher centerheight pillow block type UCPH (d ~ )... Light duty pillow block type LP (d ~ 4)... LP (d ~ 4)... Compact series pillow block type UP (d ~ )... tainless-series pillow block type UCP-H (d ~ )... UCP-H (d ~ 4)... 4 UP- (d ~ )... Pressed steel pillow block type PP (d ~ )... PP (d ~ )... quare-flanged type quare-flanged type UCF (d ~ 4)... UCF-E (d ~ )... NNF (d ~ )... UKF (d ~ )... quare-flanged type with spigot joint UCF (d ~ 4)... UKF (d ~ )... tainless-series square-flanged type UCF-H (d ~ )... Rhombic flanged type Rhombic-flanged type UCFL (d ~ )... 4 UCFL-E (d ~ )... 4 NNFL (d ~ )... UKFL (d ~ )... 4 djustable rhombic-flanged type UCF (d ~ )... Three-bolt flange type UCF (d ~ )... Light duty rhombic-flanged type LF (d ~ )... 4 LF (d ~ )... 4 Compact series rhombic-flanged type UFL (d ~ )... tainless-series rhombic-flanged type UCFL-H (d ~ )... UFL- (d ~ )... 4 Round-flanged type with spigot joint Round-flanged type with spigot joint UCFC (d ~ )... UCFCX-E (d ~ )... UKFC (d ~ )... Pressed steel flange type Pressed steel round-flanged type PF (d ~ )... PF (d ~ )... Pressed steel rhombic-flanged type PFL (d ~ )... 4 PFL (d ~ )... 4 Take-up type Take-up type UCT (d ~ 4)... UCT-E (d ~ )... UKT (d ~ )... tainless-series take-up type UCT-H (d ~ )... ection steel frame take-up type UCTH (d ~ )... Channel steel frame take-up type UCTL (d ~ 4)... 4 UCTU (d 4 ~ )... Pressed steel frame take-up type PTH (d ~ )... NPTH (d ~ )...

75 Other units Cartridge type UCC (d ~ 4)... 4 UKC (d ~ )... Hanger type UCH (d ~ )... all bearings for units Cylindrical bore (with set screws) UC,, U (d ~ 4)... (tainless-series) Cylindrical bore (with set screws) UC-, U- (d ~ )... Cylindrical bore (with eccentric locking collar), -F, N (d ~ )... Tapered bore (with adapter) UK (d ~ )... 4 Cylindrical bore (with set screws) Cylindrical outside surface ER, R (d ~ )... dapter assemblies HX (d ~ )...

76 Pillow block type UCP Cylindrical bore (with set screws) d ~ (4) mm N N UCP UCPX, With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P PX~PX P~P ±. P~P PX~PX P~P ±. PX P~P ±. Forms and dimensions of Hc of P4JE and PJE (housing with cast iron covers) are shown below. H P4JE Hc = mm PJE Hc = mm H H c H L J L 4 haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 4 /. / / / / / / / /. / / / 4. /. / 4 /. 4 / / / 4 4 / / 4 / / / / / / / / / / / / / M M M M4 M4 M4 M4 M4 M4 M4 M4 M4 M M4 M4 UCP UCP- UCP UCP- UCP UCP4- UCP4 UCP-4 UCP- UCP UCP- UCPX UCPX- UCP UCP- UCP- UCP UCP- UCP- UCPX UCPX- UCPX- P P4 P PX P P PX UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC UC- UC- UC UC- UC- UCX UCX- UCX UCPC UCPC UCPC UCP4C UCPC UCPXC UCPC UCPXC UCPCD UCPCD UCPCD UCP4CD UCPCD UCPXCD UCPCD UCPXCD / UCP4FC UCPFC UCPC UCPFC UCP4FCD UCPFCD UCPCD UCPFCD UCP P UC..... UCPC UCPCD. UCP- UCP- UCP- UCP UCP- UCPX- UCPX UCPX- P PX UC- UC- UC- UC UC- UCX- UCX UCX UCPC UCPXC UCPCD UCPXCD.. UCPFC UCPFCD UCP P UC UCPC UCPCD. UCP-4 UCP- UCP UCPX-4 UCPX UCP-4 UCP UCP- UCP- UCP- UCP UCPX- UCPX Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ / 4 /...4 M P PX P P PX UC-4 UC- UC UCX-4 UCX UC-4 UC UC- UC- UC- UC UCX- UCX UCPC UCPXC UCPC UCPXC UCPCD UCPXCD UCPCD UCPXCD UCPFC UCPC UCPFC UCPFCD UCPCD UCPFCD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCPJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available. / /

77 Pillow block type UCP Cylindrical bore (with set screws) d (4) ~ () mm N UCP UCPX, With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P PX~PX P~P ±. P~P PX~PX P~P ±. PX P~P ±. N H H H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 4 /. / / /... / / / / / 4 / 4 4 / / / / / / / / 4 / / 4 / / 4 / / / / 4 / / / / 4 / 4 / 4 4 / / / / / / / 4 / / 4 / M M M M M M M M M M M M M M M M UCP- UCP UCP- UCP- UCP UCP- UCPX- UCPX UCPX- P P PX UC- UC UC- UC- UC UC- UCX- UCX UCX UCPC UCPXC UCPCD UCPXCD UCPC UCPFC UCPCD UCPFCD UCP P UC UCPC UCPCD 4. UCP- UCP-4 UCP UCP- UCPX UCPX- UCPX- UCP- UCP UCP- UCP UCP- UCP- UCPX UCPX- P PX P P PX UC- UC-4 UC UC- UCX UCX- UCX- UC- UC UC- UC UC- UC- UCX UCX UCPC UCPXC UCPC UCPXC UCPCD UCPXCD UCPCD UCPXCD UCPFC UCPC UCPFC UCPFCD UCPCD UCPFCD UCP P UC..... UCPC UCPCD 4 4. UCP-4 UCP UCPX-4 UCPX UCP-4 UCP UCP4- UCP4 UCPX4- UCPX4 UCP4- UCP4 UCP-4 UCP UCP-4 UCPX-4 UCPX UCPX-4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ / M M P PX P P4 PX4 P4 P PX UC-4 UC UCX-4 UCX UC-4 UC UC4- UC4 UCX4- UCX4 UC4- UC4 UC-4 UC UC-4 UCX-4 UCX UCX UCPC UCPXC UCP4C UCPX4C UCPC UCPXC UCPCD UCPXCD UCP4CD UCPX4CD UCPCD UCPXCD UCPFC UCPC UCP4FC UCP4C UCPFC UCPFCD UCPCD UCP4FCD UCP4CD UCPFCD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCPJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available / /

78 Pillow block type UCP Cylindrical bore (with set screws) d () ~ 4 mm N UCP UCPX, With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P PX~PX P~P ±. P~P PX~PX P~P ±. PX P~P ±. N H H H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / / / / 4 / / / 4 / / / 4 / 4 / / / / / / / / / / / / 4 / 4 / 4 / 4 / 4 / 4 4 / 4 4 / / 4 4 / 4 / / 4 / 4 4 / 4 / 4 4 / / / 4 4 / 4 / 4 / 4 / 4 4 / / / M M M M M M M M M M M M M M M M M M UCP-4 UCP UCP-4 UCP- UCP P P UC-4 UC UC-4 UC- UC UCPC UCPCD 4. UCPC UCPFC UCPCD UCPFCD UCPX PX UCX UCPXC UCPXCD 4 /. UCP P UC.... UCPC UCPCD /.4 UCP- UCP UCPX UCPX- P PX UC- UC UCX UCX UCPC UCPXC UCPCD UCPXCD 4 / 4.. UCPFC UCPFCD UCP P UC.... UCPC UCPCD 4. UCP- UCP P UC- UC UCPC UCPCD 4. UCPFC UCPFCD UCPX PX UCX UCPXC UCPXCD. UCP- UCP P UC- UC UCPC UCPCD UCP P UC UCPC UCPCD. UCPX UCPX- UCPX-4 UCP UCP- UCP-4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ PX P UCX UCX- UCX-4 UC UC- UC UCPXC UCPC UCPXCD UCPCD UCP P UC UCPC UCPCD 4. UCP P UC... UCPC UCPCD. UCP4 P4 UC4.4.. UCP4C UCP4CD 4. UCP P UC. 4.. UCPC UCPCD 4 / 4. UCP P UC UCPC UCPCD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCPJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available / /

79 Pillow block type NP Cylindrical bore (with eccentric locking collar) d ~ mm N Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P ±. P~P ±. H N H H L J L haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N N H H L mm Cr Cr Cu f kg 4 4 /. / / / / / / / / / /. /. / / /. 4 / 4 4 / / / / / / / / / / / / / / 4 4 / 4 / 4 / / 4 4 / / / / Remarks. In Part No. of unit, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~ M M M M4 M4 M4 M4 M M M M M M NP NP- NP NP- NP NP4- NP4 NP-4 NP- NP NP- NP- NP NP- NP- NP- NP- NP- NP NP- NP-4 NP- NP NP- NP- NP- NP NP- NP- NP NP- NP- NP-4 NP NP- NP- NP NP- NP- NP-4 NP NP4- NP4 NP-4 NP P P4 P P P P P P P P P P4 P N N- N N- N N4- N4 N-4 N- N N- N- N N- N- N- N- N- N N- N-4 N- N N- N- N- N N- N- N N- N- N-4 N N- N- N N- N- N-4 N N4- N4 N-4 N s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : NPJL, NL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available.

80 Pillow block type NPK Cylindrical bore (with eccentric locking collar) d ~ mm N Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs PK4~PK ±. PK~PK ±. N H H H L J L haft Dia Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N N H H L Cr Cr Cu f kg 4 4 / / / / / / / / /. /. /. / 4 / 4. /.4 /. /. /. / / 4. 4 / / / / / 4 / 4 / 4 / 4 / 4 / 4 / 4.. / 4 / 4 / 4 / / 4 / / / NPK NPK- NPK NPK- NPK NPK4- NPK4 NPK-4 NPK- NPK NPK- NPK- NPK NPK- NPK- NPK- NPK- NPK- NPK NPK- NPK-4 NPK- NPK NPK- NPK- NPK- NPK NPK- NPK- NPK NPK- NPK- NPK-4 NPK NPK- NPK- NPK NPK- NPK- NPK-4 NPK Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~ /...4. PK4 PK PK PK PK PK PK PK PK PK N N- N N- N N4- N4 N-4 N- N N- N- N N- N- N- N- N- N N- N-4 N- N N- N- N- N N- N- N N- N- N-4 N N- N- N N- N- N-4 N For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. 4. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available.

81 Pillow block type UKP Tapered bore (with adapter) d ~ () mm N N UKP UKPX, With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P PX~PX P~P ±. P~P PX~PX P~P ±. PX P~P ±. Forms and dimensions of Hc of PJE (housing with cast iron covers) are shown below. H PJE Hc = mm H H c H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed No. d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 4 / / / 4. /. 4 / / / / 4 4 / / 4 4 / / 4 4 / / / / / / / / / / / / / / 4 / / 4 / 4 / / / / / 4 / 4 / 4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ / 4 4 / / 4 / 4 / 4 / / M M4 M4 M4 M4 M4 M4 M4 M4 M4 M M4 M4 M M M M M M M UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX HEX HX HEX HX HEX HX HX HEX HX HEX HX HEX HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX HX HX HEX UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD / UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKPJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing.. For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available. / 4 /

82 Pillow block type UKP Tapered bore (with adapter) d () ~ () mm N UKP UKPX, With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P PX~PX P~P ±. P~P PX~PX P~P ±. PX P~P ±. N H H H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed No. d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / / 4 / / / / / 4 / 4 / / / / / / / / / / / / 4 / / 4 / / 4 / 4 4 / 4 4 / / / / 4 4 / 4 / / 4 / 4 4 / / / 4 / / / 4 / 4 4 / 4 / 4 / 4 / 4 4 / / / / / / / / / / / / M M M M M M M M M M M M M M M M M M M M M Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK UKP P UK UKPX PX UKX UKP P UK HX HX HEX HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HEX HX HEX HX HEX UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPC UKPXC UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD UKPCD UKPXCD / 4 / UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPFC UKPC UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKPFCD UKPCD UKP P UK HX UKPC UKPCD 4. UKPFC UKPFCD. UKPX PX UKX HX UKPXC UKPXCD.4 UKP P UK HX UKPC UKPCD. UKP P UK UKPX PX UKX HEX HX HEX HX UKPC UKPXC UKPCD UKPXCD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKPJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing.. For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available / 4 / / /

83 Pillow block type UKP Tapered bore (with adapter) d () ~ mm N UKP UKPX, With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs P~P PX~PX P~P ±. P~P PX~PX P~P ±. PX P~P ±. N H H H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed No. d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / / / 4 / 4 / 4 / 4 / 4 / 4 / / / M M M M M Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ UKP P UK UKP P UK HEX HX HX HEX UKPC UKPC UKPCD UKPCD UKP4 P4 UK4 H4... UKP4C UKP4CD. UKP P UK HE H UKPC UKPCD UKP P UK H UKPC UKPCD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKPJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing.. For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Representative examples of the forms of housing are indicated.. Housings of spheroidal graphite iron casting are also available. 4 4 / 4...

84 Thick section pillow block type UCIP Cylindrical bore (with set screws) d 4 ~ 4 mm With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs), variations of tolerance of distance between centers of bolt holes (Js) and variations of tolerance of bolt hole diameter (Ns) Housing No. Hs Js Ns IP~IP ±. ±. ±. IP~IP IP~IP ±. ±. IP~IP ±. ±. H H -un H J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N H H mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 4 / / / / / 4 4 / 4 4 / 4 4 / / / 4 4 / 4 4 / 4 4 / / / / 4 4 / / / / / / 4 / / / 4 / / / M M M M M M M M M M M M M M M M M M UCIP-4 UCIP- UCIP UCIP- UCIP- UCIP- UCIP UCIP- UCIP- UCIP UCIP- UCIP- UCIP-4 UCIP UCIP- UCIP- UCIP UCIP- UCIP- UCIP-4 UCIP UCIP-4 UCIP UCIP4- UCIP4 UCIP-4 UCIP UCIP-4 IP IP IP IP IP IP IP IP4 IP UC-4 UC- UC UC- UC- UC- UC UC- UC- UC UC- UC- UC-4 UC UC- UC- UC UC- UC- UC-4 UC UC-4 UC UC4- UC4 UC-4 UC UC UCIPC UCIPC UCIPC UCIPC UCIPC UCIPC UCIPCD UCIPCD UCIPCD UCIPCD UCIPCD UCIPCD UCIPFC UCIPFC UCIPFC UCIPFC UCIPFC UCIPFC UCIPC UCIP4C UCIPC UCIPFCD UCIPFCD UCIPFCD UCIPFCD UCIPFCD UCIPFCD UCIPCD UCIP4CD UCIPCD UCIP IP UC.... UCIPC UCIPCD /. UCIP IP UC.... UCIPC UCIPCD 4. UCIP- UCIP IP UC- UC UCIPC UCIPCD UCIP IP UC UCIPC UCIPCD. UCIP UCIP- UCIP-4 Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~, ~ IP UC UC- UC UCIPC UCIPCD UCIP IP UC.4.. UCIPC UCIPCD. UCIP4 IP4 UC4... UCIP4C UCIP4CD. UCIP IP UC. 4.. UCIPC UCIPCD 4 /. UCIP IP UC UCIPC UCIPCD. s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UCIPJL, UCL) 4. s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available / /

85 Thick section pillow block type UKIP Tapered bore (with adapter) d ~ mm With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs), variations of tolerance of distance between centers of bolt holes (Js) and variations of tolerance of bolt hole diameter (Ns) Housing No. Hs Js Ns IP~IP ±. ±. ±. IP~IP IP~IP ±. ±. IP~IP ±. ±. H H -un H J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed No. d H L J N H H mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / 4 / 4 / 4 4 / 4 4 / 4 4 / / / 4 4 / / / / / / 4 / / / 4 / / / 4 4 / 4 / / / / / / M M M M M M M M M M M M M M M M M UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK UKIP IP UK HEX HX HX HEX HX HEX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HX HEX UKIPC UKIPC UKIPC UKIPC UKIPC UKIPC UKIPCD UKIPCD UKIPCD UKIPCD UKIPCD UKIPCD UKIPFC UKIPFC UKIPFC UKIPFC UKIPFC UKIPFC UKIPC UKIPC UKIPC UKIPC UKIPFCD UKIPFCD UKIPFCD UKIPFCD UKIPFCD UKIPFCD UKIPCD UKIPCD UKIPCD UKIPCD UKIP IP UK HX UKIPC UKIPCD. UKIP IP UK UKIP IP UK UKIP IP UK HEX HX HEX HX HX HEX UKIPC UKIPC UKIPC UKIPCD UKIPCD UKIPCD UKIP4 IP4 UK4 H4... UKIP4C UKIP4CD. UKIP IP UK Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~, ~ HE H UKIPC UKIPCD UKIP IP UK H UKIPC UKIPCD 4. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKIPJ + HX, UK + HX) 4. s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UKIPJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available / / / /

86 Tapped-base pillow block type UCP Cylindrical bore (with set screws) d ~ mm Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. Hs Js P4~P ±. ±. H H H L J L -N haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H L J N H H L Cr Cr Cu f kg 4 4 / / / / / / / /. /. / / / 4 / / 4 / M. M. M4 M4 / 4 M4 M4 4 4 M / 4 4 / 4 / / / UCP UCP- UCP UCP- UCP UCP4- UCP4 UCP-4 UCP- UCP UCP- UCP- UCP UCP- UCP- UCP- UCP- UCP- UCP UCP- UCP-4 UCP- UCP UCP- UCP- UCP- UCP UCP- UCP- UCP UCP- P4 P P P P P UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UC- UC UC- UC- UC- UC- UC- UC UC- UC-4 UC- UC UC- UC- UC- UC UC- UC- UC UC- Remarks. In Part No. of unit, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of the applicable grease nipple is --UNF.. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows Part No. of unit or bearing. (Example of Part No. : UCPJL, UCL) P s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Tapered bore (with adapter) type products are also available. (Example of Part No. : UKPJ + HX, UK + HX). Housings of spheroidal graphite iron casting are also available. 4

87 Higher centerheight pillow block type UCPH Cylindrical bore (with set screws) d ~ mm Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs PH4~PH ±. H N H N H L J L haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N N H H L mm Cr Cr Cu f kg 4 4 / / / / / / / 4 / / 4 / / / / / / 4 / M M M4 M4 M4 M4 UCPH UCPH- UCPH UCPH- UCPH UCPH4- UCPH4 UCPH-4 UCPH- UCPH UCPH- UCPH- UCPH UCPH- UCPH- UCPH- UCPH- UCPH- UCPH UCPH- UCPH-4 UCPH- UCPH UCPH- UCPH- UCPH- UCPH UCPH- UCPH- UCPH UCPH- PH4 PH PH PH PH PH UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UC- UC UC- UC- UC- UC- UC- UC UC- UC-4 UC- UC UC- UC- UC- UC UC- UC- UC UC- Remarks. In Part No. of unit, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of the applicable grease nipple is --UNF.. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows Part No. of unit or bearing. (Example of Part No. : UCPHJL, UCL) /...4 M PH s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Tapered bore (with adapter) type products are also available. (Example of Part No. : UKPHJ + HX, UK + HX)

88 Light duty pillow block type LP Cylindrical bore (with set screws) d ~ 4 mm LP Cylindrical bore (with eccentric locking collar) N Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs LP~LP ±. N H H LP H L J L LP haft Dia. Dimensions olt Unit earing Unit earing Housing asic Fatigue Factor Mass mm inch inch ize No. No. No. No. No. Load Ratings Load Limit mm kn kn kg inch LP LP mm Cr Cr Cu f LP LP d H L J N N H H L LP LP / 4 / /... LP- - LP- - LP LP LP M LP- - LP- - LP LP 4 / / / / / /. /. / / / / / 4 4 / / / 4 / 4 / 4 / / / 4 / M M M M M LP4- LP4 LP-4 LP- LP LP- LP- LP LP- LP- LP- LP- LP LP- LP-4 LP Remarks. In Part No. of unit, fi tting codes follow bore diameter codes. (ee Table. in P..). llowable load to housing in radial direction is approximately half of basic load rating of bearing, Cr (when safety factor is 4).. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit LP4- LP4 LP-4 LP- LP LP- LP- LP LP- LP- LP- LP- LP- LP LP- LP-4 LP- LP LP LP LP LP LP

89 Compact series pillow block type UP Cylindrical bore (with set screws) d ~ mm Open Ends Type Closed End Type Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. Hs Js P~P ±. ±. H H -un H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Rubber Coated Covers mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d H L J N H H L mm kg Cr Cr Cu f Ends Type End Type s kg 4 / 4 / 4 / 4 4 / 4 4 / / / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. / M M M M / M / M M UP P U UPC UPCD. UP P U UPC UPCD. UP P U..... UPC UPCD. UP P U UPC UPCD /. UP4 P4 U UP4C UP4CD. UP P U UPC UPCD 4 /. UP P U UPC UPCD.4

90 tainless-series pillow block type UCP-H Cylindrical bore (with set screws) d ~ mm With Pressed tainless teel Covers Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) Housing No. Hs PH~PH ±. PH~PH ±. N N H H H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed tainless teel Covers mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d H L J N N H H L mm kg Cr Cr Cu f Ends Type End Type s kg 4 4 /. /. / / / 4 / / / 4 / / / / / / / 4 / 4 / / 4 / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of the applicable grease nipple is --UNFN.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit / M M M4 M4 M4 M4 M UCP4H P4H UC UCP4HC UCP4HCD 4. UCPH PH UC..... UCPHC UCPHCD 4 /. UCPH PH UC UCPHC UCPHCD. UCPH PH UC UCPHC UCPHCD.4 UCPH PH UC UCPHC UCPHCD. UCPH PH UC UCPHC UCPHCD. UCPH PH UC UCPHC UCPHCD 4.

91 tainless-series tapped base pillow block type UCP-H Cylindrical bore (with set screws) d ~ 4 mm With Pressed tainless teel Covers Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. Hs Js PH~PH ±. ±. H H H H L J L -N haft Dia. Dimensions tandard asic Fatigue Factor With Pressed tainless teel Covers mm inch Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch Open Closed d H L J N H H H L kg Cr Cr Cu f Ends Type End Type s kg 4 /. /. / / 4. / 4 / / / / / 4 M. M. M4 M4 / 4 M4 / / 4 / 4 / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of the applicable grease nipple is --UNFN.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. UCP4H P4H UC UCP4HC UCP4HCD 4.4 UCPH PH UC..... UCPHC UCPHCD 4 /. UCPH PH UC UCPHC UCPHCD. UCPH PH UC..... UCPHC UCPHCD. UCPH PH UC UCPHC UCPHCD. 4

92 tainless-series pillow block type UP- Cylindrical bore (with set screws) d ~ mm Open Ends Type Closed End Type Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. Hs Js P~P ±. ±. H H -un H L J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Rubber Coated Covers mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d H L J N H H L mm kg Cr Cr Cu f Ends Type End Type s kg 4 / 4 / 4 / 4 / / / / / 4. / /. / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. M M M M / M / M M UP P U..... UPC UPCD. UP P U UPC UPCD. UP P U UPC UPCD. UP P U UPC UPCD /.4 UP4 P4 U UP4C UP4CD. UP P U UPC UPCD 4 /. UP P U UPC UPCD.4

93 Pressed steel pillow block type PP Cylindrical bore (with set screws) d ~ mm PP Cylindrical bore (with eccentric locking collar) Variations of tolerance of distance between centers of bolt holes (Js) and variations of tolerance of bolt hole diameter (Ns) Housing No. Js Ns PP~PP ±.4 ±. H -un H H PP J L PP haft Dia Dimensions olt Unit earing Unit earing Housing asic Fatigue Factor Mass mm inch inch ize No. No. No. No. No. Load Ratings Load Limit mm kn kn kg inch PP PP mm Cr Cr Cu f PP PP d H L J N H H PP PP 4... PP- - PP- - / PP PP PP M PP- - PP- - PP PP / /.4. /. 4 4 Remark For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit / M M M PP4- PP4 4-4 PP-4-4 PP- - PP PP- - PP- - PP PP- - PP- - PP4- PP4 4-4 PP-4-4 PP- - PP PP- - PP- - PP PP- - PP- - PP PP PP

94 quare-flanged type UCF Cylindrical bore (with set screws) d ~ (4) mm 4-uN L J With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F4~F FX~FX F~F ±.. F~F FX~FX F~F ±. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4~F FX~FX F~F ±. FX F~F ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg 4 4 / / / / / / / / / 4. / / 4 4 / 4 / 4 / / / / 4 / 4 / 4 / / / 4. / M M M M4 M M4 M4 / M M4 M M4 M M UCF UCF- UCF UCF- UCF UCF4- UCF4 UCF-4 UCF- UCF UCF- UCFX UCFX- UCF UCF- UCF- UCF UCF- UCF- UCFX UCFX- UCFX- F4 F FX F F FX UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC UC- UC- UC UC- UC- UCX UCX- UCX UCFC UCFC UCFC UCF4C UCFC UCFXC UCFC UCFXC UCFD UCFD UCFD UCF4D UCFD UCFXD UCFD UCFXD / UCF4FC UCFFC UCFC UCFFC UCF4FD UCFFD UCFD UCFFD UCF F UC..... UCFC UCFD /. UCF- UCF- UCF- UCF UCF- UCFX- UCFX UCFX- F FX UC- UC- UC- UC UC- UCX- UCX UCX UCFC UCFXC UCFD UCFXD 4. / /.. UCFFC UCFFD UCF F UC UCFC UCFD 4. UCF-4 UCF- UCF UCFX-4 UCFX UCF-4 UCF UCF- UCF- UCF- UCF UCFX- UCFX Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ /. / M4 M F FX F F FX UC-4 UC- UC UCX-4 UCX UC-4 UC UC- UC- UC- UC UCX- UCX UCFC UCFXC UCFC UCFXC UCFD UCFXD UCFD UCFXD... /..4.. UCFFC UCFC UCFFC UCFFD UCFD UCFFD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available / /

95 quare-flanged type UCF Cylindrical bore (with set screws) d (4) ~ () mm 4-uN L J With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F4~F FX~FX F~F ±.. F~F FX~FX F~F ±. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4~F FX~FX F~F ±. FX F~F ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg 4 / / 4 / / / / / / / / / / 4 4 / 4 / 4 / 4 / / 4 / / / / 4 / 4 / /.4... /..4 /.4. / M M4 M M M M M M M M M M M M M M M UCF- UCF UCF- UCF- UCF UCF- UCFX- UCFX UCFX- F F FX UC- UC UC- UC- UC UC- UCX- UCX UCX UCFC UCFXC UCFD UCFXD 4 /.. UCFC UCFFC UCFD UCFFD UCF F UC UCFC UCFD. UCF- UCF-4 UCF UCF- UCFX UCFX- UCFX- UCF- UCF UCF- UCF UCF- UCF- UCFX UCFX- F FX F F FX UC- UC-4 UC UC- UCX UCX- UCX- UC- UC UC- UC UC- UC- UCX UCX UCFC UCFXC UCFC UCFXC UCFD UCFXD UCFD UCFXD UCFFC UCFC UCFFC UCFFD UCFD UCFFD UCF F UC..... UCFC UCFD. UCF-4 UCF UCFX-4 UCFX UCF-4 UCF UCF4- UCF4 UCFX4- UCFX4 UCF4- UCF4 UCF-4 UCF UCF-4 UCFX-4 UCFX UCFX-4 Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ / M F FX F F4 FX4 F4 F FX UC-4 UC UCX-4 UCX UC-4 UC UC4- UC4 UCX4- UCX4 UC4- UC4 UC-4 UC UC-4 UCX-4 UCX UCX UCFC UCFXC UCF4C UCFX4C UCFC UCFXC UCFD UCFXD UCF4D UCFX4D UCFD UCFXD / UCFFC UCFC UCF4FC UCF4C UCFFC UCFFD UCFD UCF4FD UCF4D UCFFD. 4. / / / 4 /. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available

96 quare-flanged type UCF Cylindrical bore (with set screws) d () ~ 4 mm 4-uN L J With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F4~F FX~FX F~F ±.. F~F FX~FX F~F ±. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4~F FX~FX F~F ±. FX F~F ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg / / / 4 / / 4 / 4 / 4 / 4 4 / 4 4 / 4 4 / 4 / / 4 / / 4 / / / 4 / / 4 / 4 / / 4 / / / / 4 / 4 4 / / /.. /.. /. 4 /. / M M M M M M M M M M M M M M M M M M UCF-4 UCF UCF-4 UCF- UCF F F UC-4 UC UC-4 UC- UC UCFC UCFD.. UCFC UCFFC UCFD UCFFD UCFX FX UCX UCFXC UCFXD. /.4 UCF F UC.... UCFC UCFD 4 4. UCF- UCF UCFX UCFX- F FX UC- UC UCX UCX UCFC UCFXC UCFD UCFXD UCFFC UCFFD UCF F UC.... UCFC UCFD 4. UCF- UCF F UC- UC UCFC UCFD. 4.4 UCFFC UCFFD UCFX FX UCX UCFXC UCFXD 4 4. UCF- UCF F UC- UC UCF F UC UCFC UCFD 4. UCFX UCFX- UCFX-4 UCF UCF- UCF-4 Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ FX F UCX UCX- UCX-4 UC UC- UC UCF F UC UCFC UCFD 4 /. UCF F UC... UCFC UCFD 4 / 4. UCF4 F4 UC UCF4C UCF4D. UCF F UC. 4.. UCFC UCFD. UCF F UC UCFC UCFD / UCFC UCFXC UCFC UCFD UCFXD UCFD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available. 4 4 / 4 / 4 4 / 4 /

97 quare-flanged type UCF-E Cylindrical bore (with set screws) d ~ mm 4-uN L J Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F4E~FE FXE~FXE ±.. FE~FE FXE~FXE ±. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4E~FE FXE~FXE ±. haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d L J N Cr Cr Cu f kg 4 4 / / / / / / / / / /. / / 4 4 / 4 / 4 / 4 / / / / 4 / 4 / 4 / / /. /..4 / Remarks. In Part No. of unit, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X / / / / / / UCFE UCF-E UCFE UCF-E UCFE UCF4-E UCF4E UCF-4E UCF-E UCFE UCF-E UCFXE UCFX-E UCF-E UCFE UCF-E UCF-E UCFXE UCFX-E UCFX-E UCF-E UCF-E UCF-E UCFE UCF-E UCFX-E UCFXE UCFX-E UCF-4E UCF-E UCFE UCFX-4E UCFXE UCFX-E UCFXE UCFX-E UCFXE UCFX-E UCF-E UCF-4E UCFE UCF-E UCFXE UCFX-E UCFX-E F4E FE FXE FE FXE FE FXE FE FXE FXE FXE FE FXE UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC- UC UC- UC- UCX UCX- UCX- UC- UC- UC- UC UC- UCX- UCX UCX- UC-4 UC- UC UCX-4 UCX UCX- UCX UCX- UCX UCX- UC- UC-4 UC UC- UCX UCX- UCX s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFEJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available.

98 quare-flanged type UCF-E Cylindrical bore (with set screws) d ~ mm 4-uN L J Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F4E~FE FXE~FXE ±.. FE~FE FXE~FXE ±. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4E~FE FXE~FXE ±. haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d L J N Cr Cr Cu f kg / / / / / 4 / 4 / 4 / / / / / 4 / 4 / 4 4 / 4 / 4 4 / 4 / / Remarks. In Part No. of unit, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X / / / / / / UCF-E UCFE UCF-E UCF-E UCFXE UCFX-E UCF-4E UCFE UCFX-4E UCFXE UCFX4-E UCFX4E UCFX-4E UCFXE UCFX-4E UCF-E UCFE FE FXE FE FXE FX4E FXE FE UC- UC UC- UC- UCX UCX- UC-4 UC UCX-4 UCX UCX4- UCX4 UCX-4 UCX UCX-4 UC- UC / UCFXE FXE UCX / / UCF-E UCFE UCFXE UCFX-E FE FXE UC- UC UCX UCX s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFEJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available.

99 quare-flanged type NNF Cylindrical bore (with eccentric locking collar) d ~ mm 4-uN L J Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X NF4~NF ±.. NF~NF ±. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns NF4~NF ±. haft Dia Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d L J N Cr Cr Cu f kg 4 4 / / / / / / / / / /. / / / /. / 4 / /. / / / / / / NNF NNF- NNF NNF- NNF NNF4- NNF4 NNF-4 NNF- NNF NNF- NNF- NNF NNF- NNF- NNF- NNF- NNF- NNF NNF- NNF-4 NNF- NNF NNF- NNF- NNF- NNF NNF- NNF- NNF NNF- NNF- NNF-4 NNF NNF- NNF- NNF NNF- NNF- Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~.... NF4 NF NF NF NF NF NF NF NF N N- N N- N N4- N4 N-4 N- N N- N- N N- N- N- N- N- N N- N-4 N- N N- N- N- N N- N- N N- N- N-4 N N- N- N N- N For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. 4. Housings of spheroidal graphite iron casting are also available.

100 quare-flanged type UKF Tapered bore (with adapter) d ~ () mm 4-uN L J With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F~F FX~FX F~F ±.. F~F FX~FX F~F ±. e L J e e Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F~F FX~FX F~F ±. FX F~F ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed de No. d L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg (min.) / / HEX. UKF F UK M HX. UKFC UKFD 4.. UKFFC UKFFD 4 /. 4 / 4 / / HEX. UKFX FX UKX M HX. UKFXC UKFXD.. 4 HEX.4 UKF F UK M4 HX.4 UKFC UKFD / HX. UKFC UKFD. UKF F UK UKFFC UKFFD.. M HEX. 4 / HX. UKFXC UKFXD 4 UKFX FX UKX..4.. / M4 HEX HX. UKFC UKFD UKF F UK.... /. 4 M4 HEX. 4 / / / HX. UKF F UK M HX. UKFC UKFD 4 /. UKFFC UKFFD. 4 / / HX. UKFX FX UKX M4 HX. UKFXC UKFXD. /. / / / HX. UKF F UK M HX. UKFC UKFD 4. HEX. UKF F UK HX / 4 / 4 / 4 / 4 / 4 4 / 4 / / 4 / 4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ 4. / /. 4. / 4 / 4 / 4 / / / 4 / 4 / / 4 4 M4 M M M4 M M M4 M M M M UKFX FX UKX UKF F UK UKF F UK UKFX FX UKX UKF F UK UKF F UK UKFX FX UKX UKF F UK UKF F UK UKFX FX UKX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX HX HX HEX UKFC UKFXC UKFC UKFXC UKFC UKFXC UKFC UKFXC UKFD UKFXD UKFD UKFXD UKFD UKFXD UKFD UKFXD / / UKFFC UKFC UKFFC UKFC UKFFC UKFC UKFFC UKFFD UKFD UKFFD UKFD UKFFD UKFD UKFFD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UKFJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available /

101 quare-flanged type UKF Tapered bore (with adapter) d () ~ () mm 4-uN L J With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F~F FX~FX F~F ±.. F~F FX~FX F~F ±. e L J e e Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F~F FX~FX F~F ±. FX F~F ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed de No. d L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg (min.) / / / HX. UKF F UK HX UKFC UKFD 4 4 M /. HEX. / HX 4. UKF F UK M HX 4. UKFC UKFD. 4. UKFFC UKFFD 4. / / / / HX. UKFX FX UKX M HX. UKFXC UKFXD.. / / HX. UKF F UK..... M HX. UKFC UKFD. / / HEX. UKF F UK HX UKFC UKFD M /. UKFFC UKFFD /. HX. / / / / HEX. UKFX FX UKX HX UKFXC UKFXD M. HX. / / / HEX. UKF F UK HX..... UKFC UKFD 4. M /. HX. / HEX. UKF F UK M HX. UKFC UKFD.. UKFFC UKFFD. / / / HEX. UKFX FX UKX M HX. UKFXC UKFXD 4.. HEX. UKF F UK M HX. UKFC UKFD 4 /. / / HEX. UKF F UK M HX. UKFC UKFD.. UKFFC UKFFD 4 /. / 4 / / / HEX. UKFX FX UKX M HX. UKFXC UKFXD.. / / / HEX. UKF F UK.... M HX. UKFC UKFD 4 4. / HX. UKFC UKFD. UKF F UK UKFFC UKFFD M HEX. / 4 / / HX.4 UKFXC UKFXD. 4.4 UKFX FX UKX M HEX.4 / 4 HX. UKFC UKFD 4 UKF F UK M HEX. / 4 / / / 4 / 4 / / 4 / / / / / M M M M M Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ UKF F UK HX UKFC UKFD. 4.4 UKFFC UKFFD 4 /. UKFX FX UKX HX UKFXC UKFXD 4 4. UKF F UK HX UKFC UKFD 4 /. UKF F UK UKFX FX UKX HEX HX HEX HX UKFC UKFXC UKFD UKFXD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UKFJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available

102 quare-flanged type UKF Tapered bore (with adapter) d () ~ mm 4-uN L J With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F~F FX~FX F~F ±.. F~F FX~FX F~F ±. e L J e e Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F~F FX~FX F~F ±. FX F~F ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed de No. d L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg (min.) / 4 / / HEX.4 UKF F UK M HX.4 UKFC UKFD HX. UKFC UKFD 4 UKF F UK.. / M HEX. 4 / 4 / / M UKF4 F4 UK4 H UKF4C UKF4D. 4 4 / / 4 HE. UKF F UK M H. UKFC UKFD. 4 / M UKF F UK H UKFC UKFD /. Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UKFJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available.

103 quare-flanged type with spigot joint UCF Cylindrical bore (with set screws) d ~ 4 mm uh 4 4-uN L J L J uh With Cast Iron Cover 4 C Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y F.4 F~F ±....4 F~F F~F F4~F F~F F4~F.. ~F. ±. F~..4. Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F~ ±. F~ ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d L H J N 4 mm kg Cr Cr Cu f End Type End Type c kg 4 4 / 4 4 / / / / / / / / / / / / 4 4 / / 4 / / / / / / / 4 / / / 4 / 4 / / 4 / 4 / / 4 4 / M4 M4 M M M M M M M M M M M M M M M M M M M UCF UCF- F UC UC UCFC UCFD UCF F UC..... UCFC UCFD. UCF F UC UCFC UCFD. UCF-4 UCF UCF- UCF F F UC-4 UC UC- UC UCFC UCFC UCFD UCFD UCF F UC UCFC UCFD. UCF- UCF F UC- UC UCFC UCFD UCF F UC UCFC UCFD /. UCF-4 UCF UCF4- UCF4 UCF-4 UCF UCF-4 F F4 F UC-4 UC UC4- UC4 UC-4 UC UC UCFC UCF4C UCFC UCFD UCF4D UCFD UCF F UC.... UCFC UCFD /. UCF F UC.... UCFC UCFD /. UCF- UCF F UC- UC UCFC UCFD UCF F UC UCFC UCFD 4. UCF UCF- UCF-4 Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~ F UC UC- UC UCFC UCFD UCF F UC UCFC UCFD. UCF F UC... UCFC UCFD 4.4 UCF4 F4 UC4... UCF4C UCF4D.4 UCF F UC. 4.. UCFC UCFD 4. UCF F UC UCFC UCFD 4 4 / s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UCFJL, UCL) 4. The dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available...

104 quare-flanged type with spigot joint UKF Tapered bore (with adapter) d ~ mm uh 4 4-uN L J L J uh With Cast Iron Cover 4 C Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y F.4 F~F ±....4 F~F F~F F~F F~F F4~F.. ~F. ±. F~..4. Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F~ ±. F~ ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch inch Open Closed No. d L H J N 4 mm kg Cr Cr Cu f End Type End Type c kg / / / / / / / / / / / 4 4 / / 4 / / / / / / / 4 / / / 4 / /. / / / / 4 / 4 / / / / / M4 M4 M M M M M M M M M M M M M M M M M Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~ UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK UKF F UK HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HX HEX UKFC UKFC UKFC UKFC UKFC UKFC UKFC UKFC UKFC UKFC UKFC UKFC UKFD UKFD UKFD UKFD UKFD UKFD UKFD UKFD UKFD UKFD UKFD UKFD UKF F UK HX UKFC UKFD. UKF F UK UKF F UK UKF F UK HEX HX HEX HX HX HEX UKFC UKFC UKFC UKFD UKFD UKFD UKF4 F4 UK4 H4... UKF4C UKF4D. UKF F UK HE H UKFC UKFD UKF F UK H UKFC UKFD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFJ + HX, UK + HX) 4. s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UKFJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available / / / /

105 tainless-series square-flanged type UCF-H Cylindrical bore (with set screws) d ~ mm 4-uN L J With Pressed tainless teel Cover Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X F4H~H ±.. L J Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4H~H ±. haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed tainless teel Cover mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d L J N mm kg Cr Cr Cu f End Type End Type s kg / / 4 / / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of the applicable grease nipple is --UNFN.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. M M M / M M4 M4 M4 UCF4H F4H UC UCF4HC UCF4HD.. UCFH FH UC..... UCFHC UCFHD 4.. UCFH FH UC UCFHC UCFHD.. UCFH FH UC..... UCFHC UCFHD 4 /. UCFH FH UC UCFHC UCFHD. /. UCFH FH UC UCFHC UCFHD.. UCFH FH UC UCFHC UCFHD /.

106 Rhombic-flanged type UCFL Cylindrical bore (with set screws) d ~ (4) mm With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FL4~FL FLX~FLX FL~FL ±.. FL~FL FL~FL4 ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL4~FL FLX~FLX FL~FL ±. FL~FL4 ±. Forms and dimensions of Lc of FL4JE and FLJE (housing with cast iron cover) are shown below. J H L c FL4JE Lc = mm FLJE Lc = mm haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg 4 4 / / / / / / / 4 / / 4 / 4 / / / / 4 / / /. / / 4 4 / 4 / 4 / / / / 4 / 4 / 4 / 4 / / / 4. / M M4 M M M4 M4 M M4 M4 M M4 M4 M UCFL UCFL- UCFL UCFL- UCFL UCFL4- UCFL4 UCFL-4 UCFL- UCFL UCFL- UCFLX UCFLX- UCFL UCFL- UCFL- UCFL UCFL- UCFL- UCFLX UCFLX- UCFLX- FL4 FL FLX FL FL FLX UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC UC- UC- UC UC- UC- UCX UCX- UCX UCFLC UCFLC UCFLC UCFL4C UCFLC UCFLXC UCFLC UCFLXC UCFLD UCFLD UCFLD UCFL4D UCFLD UCFLXD UCFLD UCFLXD / UCFL4FC UCFLFC UCFLC UCFLFC UCFL4FD UCFLFD UCFLD UCFLFD UCFL FL UC..... UCFLC UCFLD /. UCFL- UCFL- UCFL- UCFL UCFL- UCFLX- UCFLX UCFLX- FL FLX UC- UC- UC- UC UC- UCX- UCX UCX UCFLC UCFLXC UCFLD UCFLXD 4. / /.. UCFLFC UCFLFD UCFL FL UC UCFLC UCFLD 4. UCFL-4 UCFL- UCFL UCFLX-4 UCFLX UCFL-4 UCFL UCFL- UCFL- UCFL- UCFL UCFLX- UCFLX Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X, ~4 / 4 /. / M M4 FL FLX FL FL FLX UC-4 UC- UC UCX-4 UCX UC-4 UC UC- UC- UC- UC UCX- UCX UCFLC UCFLXC UCFLC UCFLXC UCFLD UCFLXD UCFLD UCFLXD... /....4 UCFLFC UCFLC UCFLFC UCFLFD UCFLD UCFLFD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCFLJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available / /

107 Rhombic-flanged type UCFL Cylindrical bore (with set screws) d (4) ~ () mm With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FL4~FL FLX~FLX FL~FL ±.. FL~FL FL~FL4 ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL4~FL FLX~FLX FL~FL ±. FL~FL4 ±. Forms and dimensions of Lc of FL4JE and FLJE (housing with cast iron cover) are shown below. J H L c FL4JE Lc = mm FLJE Lc = mm haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg 4 / / / / / 4 / 4 / / / / / 4 / / / / / / 4 4 / 4 / 4 4 / 4 / / / / / / / /.4. /. /.4 /.. /. / M M M M M M M M M M M M M M M M M M M UCFL- UCFL UCFL- UCFL- UCFL UCFL- UCFLX- UCFLX UCFLX- FL FL FLX UC- UC UC- UC- UC UC- UCX- UCX UCX UCFLC UCFLXC UCFLD UCFLXD 4 /.. UCFLC UCFLFC UCFLD UCFLFD UCFL FL UC UCFLC UCFLD. UCFL- UCFL-4 UCFL UCFL- UCFL- UCFL UCFL- UCFL UCFL- UCFL- FL FL FL UC- UC-4 UC UC- UC- UC UC- UC UC- UC UCFLC UCFLC UCFLD UCFLD.. 4. UCFLFC UCFLC UCFLFC UCFLFD UCFLD UCFLFD UCFL FL UC..... UCFLC UCFLD. UCFL-4 UCFL UCFL-4 UCFL UCFL4- UCFL4 UCFL4- UCFL4 UCFL-4 UCFL UCFL-4 UCFL-4 UCFL UCFL-4 UCFL- UCFL FL FL FL4 FL4 FL FL FL UC-4 UC UC-4 UC UC4- UC4 UC4- UC4 UC-4 UC UC-4 UC-4 UC UC-4 UC- UC UCFLC UCFL4C UCFLC UCFLC UCFLD UCFL4D UCFLD UCFLD /...4. UCFLFC UCFLC UCFL4FC UCFL4C UCFLFC UCFLC UCFLFC UCFLFD UCFLD UCFL4FD UCFL4D UCFLFD UCFLD UCFLFD UCFL FL UC UCFLC UCFLD 4. UCFL- UCFL FL UC- UC UCFLC UCFLD.. UCFLFC UCFLFD UCFL FL UC.... UCFLC UCFLD 4. UCFL- UCFL Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X, ~4 FL UC- UC UCFLC UCFLD. 4. UCFLFC UCFLFD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCFLJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available / / / / 4 / 4 / 4 4 /

108 Rhombic-flanged type UCFL Cylindrical bore (with set screws) d () ~ mm With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FL4~FL FLX~FLX FL~FL ±.. FL~FL FL~FL4 ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL4~FL FLX~FLX FL~FL ±. FL~FL4 ±. Forms and dimensions of Lc of FL4JE and FLJE (housing with cast iron cover) are shown below. J H L c FL4JE Lc = mm FLJE Lc = mm haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg / 4 / 4 / 4 / / 4 / / 4 / / / M M M M M4 UCFL- UCFL FL UC- UC UCFLC UCFLD UCFL FL UC UCFLC UCFLD 4. UCFL UCFL- UCFL-4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X, ~4 FL UC UC- UC UCFL FL UC... UCFLC UCFLD 4 /. UCFL4 FL4 UC4... UCFL4C UCFL4D.4 UCFLC UCFLD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCFLJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available. 4 4 /..

109 Rhombic-flanged type UCFL-E Cylindrical bore (with set screws) d ~ mm Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FLE~FLE ±.. FLE~FLE ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FLE~FLE ±. J H haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N Cr Cr Cu f kg / / / / / / / / / / / 4 / 4 / / / / / /.. / 4 / 4 / / / / / 4 / 4 4 / 4 /. / /. 4. / Remarks. In Part No. of unit, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~ / / / / / / / / / UCFLE UCFL-E UCFLE UCFL-E UCFLE UCFL4-E UCFL4E UCFL-4E UCFL-E UCFLE UCFL-E UCFL-E UCFLE UCFL-E UCFL-E UCFL-E UCFL-E UCFL-E UCFLE UCFL-E UCFL-4E UCFL-E UCFLE UCFL-E UCFL-E UCFL-E UCFLE UCFL-E UCFL-E UCFLE UCFL-E UCFL-E UCFL-4E UCFLE UCFL-E UCFL-E UCFLE UCFL-E UCFL-E UCFL-4E UCFLE UCFL4-E UCFL4E UCFL-4E UCFLE UCFL-4E FLE FL4E FLE FLE FLE FLE FLE FLE FLE FLE FLE FL4E FLE UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UC- UC UC- UC- UC- UC- UC- UC UC- UC-4 UC- UC UC- UC- UC- UC UC- UC- UC UC- UC- UC-4 UC UC- UC- UC UC- UC- UC-4 UC UC4- UC4 UC-4 UC UC s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCFLEJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available. 4 4

110 Rhombic-flanged type UCFL-E Cylindrical bore (with set screws) d ~ mm Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FLE~FLE ±.. FLE~FLE ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FLE~FLE ±. J H haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N Cr Cr Cu f kg / Remarks. In Part No. of unit, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~ / / UCFL-E UCFLE UCFL-E UCFLE FLE FLE UC- UC UC- UC s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCFLEJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available. 4 4

111 Rhombic-flanged type NNFL Cylindrical bore (with eccentric locking collar) d ~ mm Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X NFL4~NFL ±.. NFL ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns NFL4~NFL ±. J H haft Dia Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N Cr Cr Cu f kg 4 4 / / / / / / / / 4 / / 4 / 4 / / /. / / 4. / / 4 / 4 / 4 / 4. / 4 / /. / / / / NNFL NNFL- NNFL NNFL- NNFL NNFL4- NNFL4 NNFL-4 NNFL- NNFL NNFL- NNFL- NNFL NNFL- NNFL- NNFL- NNFL- NNFL- NNFL NNFL- NNFL-4 NNFL- NNFL NNFL- NNFL- NNFL- NNFL NNFL- NNFL- NNFL NNFL- NNFL- NNFL-4 NNFL NNFL- Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R / NFL4 NFL NFL NFL NFL NFL NFL NFL N N- N N- N N4- N4 N-4 N- N N- N- N N- N- N- N- N- N N- N-4 N- N N- N- N- N N- N- N N- N- N-4 N N For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. 4. Housings of spheroidal graphite iron casting are also available. 4

112 Rhombic-flanged type UKFL Tapered bore (with adapter) d ~ mm With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FL~FL FLX~FLX FL~FL ±.. FL~FL FL~FL4 ±. e L -un e e Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL~FL FLX~FLX FL~FL ±. FL~FL4 ±. Forms and dimensions of Lc of FLJE (housing with cast iron cover) are shown below. J H L c FLJE Lc = mm haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed de No. d H L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg (min.) / / / HEX. UKFL FL UK M4 HX. UKFLC UKFLD 4.. UKFLFC UKFLFD 4 /. / / 4 4 / / HEX. UKFLX FLX UKX M HX. UKFLXC UKFLXD.. 4 HEX. UKFL FL UK M HX. UKFLC UKFLD 4.4 / 4 4 / HX. UKFLC UKFLD. UKFL FL UK UKFLFC UKFLFD. 4. M4 HEX. / HX. UKFLXC UKFLXD 4 UKFLX FLX UKX..4.. / M4 HEX. 4 HX. UKFLC UKFLD UKFL FL UK.... /. 4 4 M HEX. / / / HX. UKFL FL UK M4 HX. UKFLC UKFLD 4 /. UKFLFC UKFLFD. 4 4 / / HX. UKFLX FLX UKX M4 HX. UKFLXC UKFLXD. /. / / HX. UKFL FL UK M HX. UKFLC UKFLD 4.4 HEX. UKFL FL UK HX / / / / 4 / 4 / / / 4 / 4 / 4 / 4 4 / 4 / / / 4 4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X, ~4 / 4 / 4 / 4 / 4. / /. 4 / 4 / 4 / 4 / / / 4 / 4 / / 4 M4 M4 M M M4 M M M M M M UKFLX FLX UKX UKFL FL UK UKFL FL UK UKFLX FLX UKX UKFL FL UK UKFL FL UK UKFLX FLX UKX UKFL FL UK UKFL FL UK UKFL FL UK HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX HX HX HEX UKFLC UKFLXC UKFLC UKFLXC UKFLC UKFLXC UKFLC UKFLD UKFLXD UKFLD UKFLXD UKFLD UKFLXD UKFLD... 4 / / UKFLFC UKFLC UKFLFC UKFLC UKFLFC UKFLC UKFLFC UKFLC UKFLFD UKFLD UKFLFD UKFLD UKFLFD UKFLD UKFLFD UKFLD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFLJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKFLJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available / /

113 Rhombic-flanged type UKFL Tapered bore (with adapter) d ~ mm With Pressed teel Cover With Cast Iron Cover C Variations of tolerance of distance from mounting surface to center of spherical bore (s) and tolerance of position of bolt hole (X) Housing No. s X FL~FL FLX~FLX FL~FL ±.. FL~FL FL~FL4 ±. e L -un e e Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL~FL FLX~FLX FL~FL ±. FL~FL4 ±. Forms and dimensions of Lc of FLJE (housing with cast iron cover) are shown below. J H L c FLJE Lc = mm haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed de No. d H L J N mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg (min.) / HX 4. UKFL FL UK M HX 4. UKFLC UKFLD. 4. UKFLFC UKFLFD 4. / / HX. UKFL FL UK..... M HX. UKFLC UKFLD. / / HEX. UKFL FL UK HX UKFLC UKFLD M /. UKFLFC UKFLFD /. HX. HEX. / / UKFL FL UK HX..... UKFLC UKFLD 4 4. M /. HX. / / HEX. UKFL FL UK M HX. UKFLC UKFLD.. UKFLFC UKFLFD. / / HEX.4 UKFL FL UK..4.. M HX.4 UKFLC UKFLD 4 /. / HEX. UKFL FL UK M HX. UKFLC UKFLD.. UKFLFC UKFLFD 4 /.4 / / HEX. UKFL FL UK.... M HX. UKFLC UKFLD 4. 4 HX. UKFLC UKFLD. UKFL FL UK UKFLFC UKFLFD M HEX. 4 / / 4 HX. UKFLC UKFLD 4 UKFL FL UK M HEX. / 4 / 4 4 / / / / 4 / 4 4 / / 4 / /. 4 4 / 4. / M M M M M M4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X, ~4 UKFL FL UK HX UKFLC UKFLD. 4. UKFLFC UKFLFD 4 /. UKFL FL UK HX UKFLC UKFLD 4 /. UKFL FL UK UKFL FL UK UKFL FL UK HEX HX HEX HX HX HEX UKFLC UKFLC UKFLC UKFLD UKFLD UKFLD UKFL4 FL4 UK4 H4... UKFL4C UKFL4D.. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFLJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKFLJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available /

114 djustable rhombic-flanged type UCF Cylindrical bore (with set screws) d ~ mm H Variations of tolerance of distance from mounting surface to center of spherical bore (s) Housing No. s F4~F ±. F ±. L L N N un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4~F ±. J haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J N N N L mm Cr Cr Cu f kg 4 4 / / / / / / / / 4 4 / 4 / / / / / 4 / / 4 / 4 / / 4 / / / 4 / 4 / / 4 / / / 4 / / 4 / 4 / 4 / /..... / 4 / / M M M / M / M M4 M4 UCF UCF- UCF UCF- UCF UCF4- UCF4 UCF-4 UCF- UCF UCF- UCF- UCF UCF- UCF- UCF- UCF- UCF- UCF UCF- UCF-4 UCF- UCF UCF- UCF- UCF- UCF UCF- UCF- UCF UCF- UCF- UCF-4 UCF UCF- Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R / M4 F4 F F F F F F F UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UC- UC UC- UC- UC- UC- UC- UC UC- UC-4 UC- UC UC- UC- UC- UC UC- UC- UC UC- UC- UC-4 UC UC s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows Part No. of unit or bearing. (Example of Part No. : UCFJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Tapered bore (with adapter) type products are also available. (Example of Part No. : UKFJ + HX, UK + HX)

115 Three-bolt flange type UCF Cylindrical bore (with set screws) d ~ mm L Variations of tolerance of distance from mounting surface to center of spherical bore (s), variations of tolerance of distance between centers of bolt holes (Js, Js), variations of tolerance of distance between both grooves (Hs) Housing No. s Js Js Hs F4~F ±. H H J H -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns F4~F ±. J L haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d H L J J N H H L mm Cr Cr Cu f kg 4 4 / / / / / / / 4 4 / / / / / 4 / 4 / 4. / / /.. / 4 4 / 4 4 / / 4 / 4 / / / / / 4 / / / / / / / M / M / M / M M M UCF UCF- UCF UCF- UCF UCF4- UCF4 UCF-4 UCF- UCF UCF- UCF- UCF UCF- UCF- UCF- UCF- UCF- UCF UCF- UCF-4 UCF- UCF UCF- UCF- UCF- UCF UCF- UCF- UCF UCF- Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of applicable grease nipple is --UNF.. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows Part No. of unit or bearing. (Example of Part No. : UCFJL, UCL) /....4 M F4 F F F F F F UC.4 UC- UC. UC-.... UC. UC4- UC4. UC-4 UC- UC UC- UC- UC UC UC- UC- UC- UC UC UC- UC-4 UC UC UC- UC- UC UC UC- UC- UC UC- 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Tapered bore (with adapter) type products are also available. (Example of Part No. : UKFJ + HX, UK + HX)

116 Light duty rhombic-flanged type LF Cylindrical bore (with set screws) d ~ mm LF Cylindrical bore (with eccentric locking collar) Variations of tolerance of distance from mounting surface to center of spherical bore (s) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. s Js LF~LF ±. ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns LF~LF ±. J H LF haft Dia. Dimensions olt Unit earing Unit earing Housing asic Fatigue Factor Mass mm inch inch ize No. No. No. No. No. Load Ratings Load Limit mm kn kn kg inch LF LF mm Cr Cr Cu f LF LF d H L J N LF LF / / /... LF- - LF- - LF LF LF M LF- - LF- - LF LF / / / / 4 / 4 / 4. / 4 /. /. / / / / / /. 4 / / / M / M M M LF4- LF4 LF-4 LF- LF LF- LF- LF LF- LF- LF- LF- LF LF- Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). llowable load to housing in radial direction is approximately half of basic load rating of bearing, Cr (when safety factor is 4).. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit LF4- LF4 LF-4 LF- LF LF- LF- LF LF- LF- LF- LF- LF- LF LF LF LF LF LF LF

117 Compact series rhombic-flanged type UFL Cylindrical bore (with set screws) d ~ mm L -un Open End Type Closed End Type Variations of tolerance of distance from mounting surface to center of spherical bore (s) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. s Js FL ±. ±. FL~FL Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL ±. FL~FL J H haft Dia. Dimensions olt tandard asic Fatigue Factor With Rubber Coated Cover mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d H L J N mm kg Cr Cr Cu f End Type End Type s kg 4 4 / 4 / 4. / / / 4. /. / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Housing is made from special light alloy.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. / / No. M4 M M M M / M / M M UFL FL U UFL FL U UFLC UFLD. /. UFL FL U UFLC UFLD. /. UFL FL U..... UFLC UFLD. UFL FL U UFLC UFLD. /. UFL4 FL4 U UFL4C UFL4D /. UFL FL U UFLC UFLD. UFL FL U UFLC UFLD.

118 tainless-series rhombic-flanged type UCFL-H Cylindrical bore (with set screws) d ~ mm With Pressed tainless teel Cover Variations of tolerance of distance from mounting surface to center of spherical bore (s) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. s Js FLH~FLH ±. ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FLH~FLH ±. J H haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed tainless teel Cover mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d H L J N mm kg Cr Cr Cu f End Type End Type s kg / / 4 / / 4 / 4 /. 4 / / / 4 / / Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter codes. (ee Table. in P..). Part No. of applicable grease nipple is --UNFN.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. M M4 M4 M4 M4 M M UCFL4H FL4H UC UCFL4HC UCFL4HD.4 UCFLH FLH UC..... UCFLHC UCFLHD 4 /. UCFLH FLH UC UCFLHC UCFLHD 4. UCFLH FLH UC..... UCFLHC UCFLHD 4 /. UCFLH FLH UC UCFLHC UCFLHD.4 UCFLH FLH UC UCFLHC UCFLHD. UCFLH FLH UC UCFLHC UCFLHD /.

119 tainless-series rhombic-flanged type UFL- Cylindrical bore (with set screws) d ~ mm Open End Type Closed End Type Variations of tolerance of distance from mounting surface to center of spherical bore (s) and variations of tolerance of distance between centers of bolt holes (Js) Housing No. s Js FL~FL ±. ±. L -un Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FL~FL ±. J H haft Dia. Dimensions olt tandard asic Fatigue Factor With Rubber Coated Cover mm inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass mm No. No. No. kn kn mm inch inch Open Closed d H L J N mm kg Cr Cr Cu f End Type End Type s kg / / /. / / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. / M M M M / M / M M UFL FL U..... UFLC UFLD. /. UFL FL U UFLC UFLD. /. UFL FL U UFLC UFLD. UFL FL U UFLC UFLD. /. UFL4 FL4 U UFL4C UFL4D /. UFL FL U UFLC UFLD. UFL FL U UFLC UFLD.

120 Round-flanged type with spigot joint UCFC Cylindrical bore (with set screws) d ~ mm uh L J 4-uN With Pressed teel Cover uh With Cast Iron Cover uh Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y FC4~FC FCX.4 FC~FC FCX~FCX.4 ±... FC~FC FCX~FCX. FC FCX~FCX ±.. FCX..4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FC4~FC FCX~FCX ±. 4 J 4 4 C haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d L H J J N 4 mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg 4 4 / / / / / / / / / 4 / / / / / /.. /. 4. / /. / / 4. / / / / /. / / /. /... /.4 / M M / M M M / M M / M M M4 / M UCFC UCFC- UCFC UCFC- UCFC UCFC4- UCFC4 UCFC-4 UCFC- UCFC UCFC- UCFCX UCFCX- UCFC- UCFC UCFC- UCFC- UCFCX UCFCX- UCFCX- UCFC- UCFC- UCFC- UCFC UCFC- UCFCX- UCFCX UCFCX- UCFC-4 UCFC- UCFC UCFCX-4 UCFCX UCFC- UCFC- UCFC- UCFC UCFCX- UCFCX UCFC- UCFC- UCFC UCFC- UCFCX- UCFCX UCFCX- Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X / M4 / M FC4 FC FCX FC FCX FC FCX FC FCX FC FCX FC FCX UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC- UC UC- UC- UCX UCX- UCX- UC- UC- UC- UC UC- UCX- UCX UCX- UC-4 UC- UC UCX-4 UCX UC- UC- UC- UC UCX- UCX UC- UC- UC UC- UCX- UCX UCX UCFCC UCFCC UCFCC UCFC4C UCFCC UCFCXC UCFCC UCFCXC UCFCC UCFCXC UCFCC UCFCXC UCFCC UCFCXC UCFCC UCFCXC UCFCD UCFCD UCFCD UCFC4D UCFCD UCFCXD UCFCD UCFCXD UCFCD UCFCXD UCFCD UCFCXD UCFCD UCFCXD UCFCD UCFCXD / / UCFC4FC UCFCFC UCFCFC UCFCFC UCFCFC UCFCFC UCFCFC UCFC4FD UCFCFD UCFCFD UCFCFD UCFCFD UCFCFD UCFCFD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFCJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available /

121 Round-flanged type with spigot joint UCFC Cylindrical bore (with set screws) d ~ mm uh L J 4-uN With Pressed teel Cover uh With Cast Iron Cover uh Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y FC4~FC FCX.4 FC~FC FCX~FCX.4 ±... FC~FC FCX~FCX. FC FCX~FCX ±.. FCX..4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FC4~FC FCX~FCX ±. 4 J 4 4 C haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch inch Open Closed Open Closed d L H J J N 4 mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg / / / / / 4 / 4 / / / 4 / 4 / / / 4 / / / / / 4 / / / / / /. /.4.4 /.... /..... / M M4 M M4 M M4 M M M M M M M M M M M UCFC- UCFC-4 UCFC UCFC- UCFCX UCFCX- UCFCX- UCFC- UCFC UCFC- UCFC- UCFCX UCFCX- UCFC-4 UCFC UCFCX-4 UCFCX UCFC4- UCFC4 UCFCX4- UCFCX4 UCFC-4 UCFC UCFC-4 UCFCX-4 UCFCX UCFCX-4 UCFC- UCFC FC FCX FC FCX FC FCX FC4 FCX4 FC FCX FC UC- UC-4 UC UC- UCX UCX- UCX- UC- UC UC- UC- UCX UCX- UC-4 UC UCX-4 UCX UC4- UC4 UCX4- UCX4 UC-4 UC UC-4 UCX-4 UCX UCX-4 UC- UC UCFCC UCFCXC UCFCC UCFCXC UCFCC UCFCXC UCFC4C UCFCX4C UCFCC UCFCXC UCFCC UCFCD UCFCXD UCFCD UCFCXD UCFCD UCFCXD UCFC4D UCFCX4D UCFCD UCFCXD UCFCD / UCFCFC UCFCFC UCFCFC UCFC4FC UCFCFC UCFCFC UCFCFD UCFCFD UCFCFD UCFC4FD UCFCFD UCFCFD UCFCX FCX UCX UCFCXC UCFCXD.. UCFC- UCFC UCFCX UCFCX- UCFC- UCFC FC FCX FC UC- UC UCX UCX- UC- UC UCFCC UCFCXC UCFCC UCFCD UCFCXD UCFCD 4... / /... UCFCFC UCFCFC UCFCFD UCFCFD UCFCX FCX UCX UCFCXC UCFCXC.4 UCFCX UCFCX- UCFCX-4 Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X FCX UCX UCX- UCX UCFCXC UCFCXD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCFCJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available.. 4 / 4 /

122 Round-flanged type with spigot joint UCFCX-E Cylindrical bore (with set screws) d ~ mm uh L J 4-uN Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y FCXE.4 ±... FCXE~FCXE.4 FCXE~FCXE.. ±. FCXE~FCXE. FCXE.4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FCXE~FCXE ±. 4 J haft Dia. Dimensions olt Unit Housing earing asic Fatigue Factor Mass mm inch inch ize No. No. No. Load Ratings Load Limit mm inch kn kn d L H J J N 4 mm Cr Cr Cu f kg / 4 4 / 4 / / 4 4 / / / / / 4. / / / 4 / / / / 4. / /. / /.4 /.. /... / Remarks. In Part No. of unit, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... X~X -R... X~X / M M M M / M / M M4 M4 M M M M M M UCFCXE UCFCX-E UCFCXE UCFCX-E UCFCX-E UCFCX-E UCFCXE UCFCX-E UCFCX-4E UCFCXE UCFCX-E UCFCXE UCFCX-E UCFCXE UCFCX-E UCFCXE UCFCX-E UCFCX-4E UCFCXE UCFCX4-E UCFCX4E UCFCX-4E UCFCXE UCFCX-4E FCXE FCXE FCXE FCXE FCXE FCXE FCXE FCXE FCX4E FCXE UCX UCX- UCX UCX- UCX- UCX- UCX UCX- UCX-4 UCX UCX- UCX UCX- UCX UCX- UCX UCX- UCX-4 UCX UCX4- UCX4 UCX-4 UCX UCX UCFCXE FCXE UCX UCFCXE UCFCX-E FCXE UCX UCX UCFCXE FCXE UCX UCFCXE UCFCX-E UCFCX-4E FCXE UCX UCX- UCX s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UCFCXEL, UCXL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available.

123 Round-flanged type with spigot joint UKFC Tapered bore (with adapter) d ~ mm uh L J 4-uN With Pressed teel Cover uh With Cast Iron Cover uh Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y FC~FC FCX.4 FC~FC FCX~FCX.4 ±... FC~FC FCX~FCX. FC FCX~FCX ±.. FCX..4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FC4~FC FCX~FCX ±. 4 J 4 4 C haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed No. d L H J J N 4 mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg / 4 / / 4 / / / / 4. /. 4. / / / 4. / / / / / 4 4 / /. / / / /... /. /. / /. 4 / 4 / 4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X / / 4 / /. 4 / 4 / 4 / / / / / / M / M M M / M M / M M M4 / M M4 / M M M4 M M4 M M4 M M UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX HEX HX HEX HX HX HEX HX HEX HX HX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX HX HX HEX HX HX HX HX HEX HX HX HEX HX HX HEX HX HEX HX UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCC UKFCXC UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD UKFCD UKFCXD / / / UKFCFC UKFCFC UKFCFC UKFCFC UKFCFC UKFCFC UKFCFC UKFCFC UKFCFC UKFCFC UKFCFD UKFCFD UKFCFD UKFCFD UKFCFD UKFCFD UKFCFD UKFCFD UKFCFD UKFCFD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFCJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKFCJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available /

124 Round-flanged type with spigot joint UKFC Tapered bore (with adapter) d ~ mm uh L J 4-uN With Pressed teel Cover uh With Cast Iron Cover uh Variations of tolerance of spigot joint outside diameter (Hs), variations of tolerance of distance from mounting surface to center of spherical bore (s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Housing No. Hs s X Y FC~FC FCX.4 FC~FC FCX~FCX.4 ±... FC~FC FCX~FCX. FC FCX~FCX ±.. FCX..4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns FC4~FC FCX~FCX ±. 4 J 4 4 C haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Cover With Cast Iron Cover mm inch inch ize Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch inch Open Closed Open Closed No. d L H J J N 4 mm kg Cr Cr Cu f End Type End Type s kg End Type End Type c kg / 4 / / / / / 4 4. / /. / / / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X M M M M M M M UKFC FC UK UKFCX FCX UKX UKFC FC UK UKFCX FCX UKX HEX HX HEX HX HX HEX HX HEX UKFCC UKFCXC UKFCC UKFCXC UKFCD UKFCXD UKFCD UKFCXD / / UKFCFC UKFCFC UKFCFD UKFCFD UKFC FC UK HX UKFCC UKFCD.. UKFCFC UKFCFD 4. UKFCX FCX UKX HX UKFCXC UKFCXD. UKFCX FCX UKX HEX HX UKFCXC UKFCXD. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKFCJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKFCJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available. / 4 /...

125 Pressed steel round-flanged type PF Cylindrical bore (with set screws) d ~ mm PF Cylindrical bore (with eccentric locking collar) uh H J N N uh Variations of tolerance of distance between centers of bolt holes (Js) Housing No. Js PF~PF ±.4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns PF~PF ±. PF haft Dia Dimensions olt Unit earing Unit earing Housing asic Fatigue Factor Mass mm inch inch ize No. No. No. No. No. Load Ratings Load Limit mm kn kn kg inch PF PF mm Cr Cr Cu f PF PF d H J N H PF PF / / /... PF- - PF- - PF PF PF M PF- - PF- - PF PF / / / / 4 / 4 / /. /. / Note ) H is the minimum size of the mounting hole. / / / / M / M M M PF4- PF4 PF-4 PF- PF PF- PF- PF PF- PF- PF- PF- PF PF PF PF4-4- PF4 4 PF PF-4-4 PF- - PF PF PF- - PF- - PF PF- - PF PF- - PF- - PF- - PF- - PF PF PF- - Remark For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.

126 Pressed steel rhombic-flanged type PFL Cylindrical bore (with set screws) d ~ mm PFL Cylindrical bore (with eccentric locking collar) uh L N N uh Variations of tolerance of distance between centers of bolt holes (Js) Housing No. Js PFL~PFL ±.4 Variations of tolerance of bolt hole diameter (Ns) Housing No. Ns PFL~PFL ±. J H PFL PFL haft Dia Dimensions olt Unit earing Unit earing Housing asic Fatigue Factor Mass mm inch inch ize No. No. No. No. No. Load Ratings Load Limit mm kn kn kg inch PFL PFL mm Cr Cr Cu f PFL PFL d H L J N H PFL PFL / / / /... PFL- - PFL- - PFL PFL PFL M PFL- - PFL- - PFL PFL / / / / 4 / 4 / / 4 / Note ) H is the minimum size of the mounting hole. /. /. / / / / / M / M M M PFL4- PFL4 PFL-4 PFL- PFL PFL- PFL- PFL PFL- PFL- PFL- PFL- PFL PFL PFL4-4- PFL4 4 PFL PFL-4-4 PFL- - PFL PFL PFL- - PFL- - PFL PFL- - PFL PFL- - PFL- - PFL- - PFL- - PFL PFL PFL- - Remark For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit. 4

127 Take-up type UCT Cylindrical bore (with set screws) d ~ (4) mm L With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T4~T TX~TX T~T +.. T~T TX~TX T~T. T~T +... T4~T.. H H H N un H H Form and dimensions of Lc of T4JE and TJE (housing with cast iron covers) are shown below. L N L c T4JE Lc = mm TJE Lc = mm L L haft Dia. Dimensions tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch Open Closed Open Closed d H H H L L L L N N N kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 4 / / / / / / / 4 / 4 4 / 4 / 4 / / 4 / 4 4 / / 4 / / / / / / 4 4 / / 4 / 4 / 4 / 4 / 4 / / / / 4 / / / 4 / / 4 / 4 4 / 4 / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ / / 4 / UCT UCT- UCT UCT- UCT UCT4- UCT4 UCT-4 UCT- UCT UCT- UCTX UCTX- UCT UCT- UCT- UCT UCT- UCT- UCTX UCTX- UCTX- T4 T TX T T TX UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC UC- UC- UC UC- UC- UCX UCX- UCX UCTC UCTC UCTC UCT4C UCTC UCTXC UCTC UCTXC UCTCD UCTCD UCTCD UCT4CD UCTCD UCTXCD UCTCD UCTXCD / UCT4FC UCTFC UCTC UCTFC UCT4FCD UCTFCD UCTCD UCTFCD UCT T UC..... UCTC UCTCD.4 UCT- UCT- UCT- UCT UCT- UCTX- UCTX UCTX- T TX UC- UC- UC- UC UC- UCX- UCX UCX UCTC UCTXC UCTCD UCTXCD.. UCTFC UCTFCD UCT T UC UCTC UCTCD. UCT-4 UCT- UCT UCTX-4 UCTX UCT-4 UCT UCT- UCT- UCT- UCT UCTX- UCTX T TX T T TX UC-4 UC- UC UCX-4 UCX UC-4 UC UC- UC- UC- UC UCX- UCX UCTC UCTXC UCTC UCTXC UCTCD UCTXCD UCTCD UCTXCD UCTFC UCTC UCTFC UCTFCD UCTCD UCTFCD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCTJL, UCL) 4. s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available. / /

128 Take-up type UCT Cylindrical bore (with set screws) d (4) ~ () mm L With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T4~T TX~TX T~T +.. T~T TX~TX T~T. T~T +... T4~T.. H H H N un H H Form and dimensions of Lc of T4JE and TJE (housing with cast iron covers) are shown below. L N L c T4JE Lc = mm TJE Lc = mm L L haft Dia. Dimensions tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch Open Closed Open Closed d H H H L L L L N N N kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 / / 4 / / / / / 4 / / 4 4 / / 4 4 / 4 4 / 4 4 / 4 4 / / / / / / / / / / / / / / / / / / 4 / 4 / 4 / / 4 4 / 4 / 4 / / 4 4 / / / / / / / 4 / / / 4 / 4 / / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ 4 4 / / UCT- UCT UCT- UCT- UCT UCT- UCTX- UCTX UCTX- T T TX UC- UC UC- UC- UC UC- UCX- UCX UCX UCTC UCTXC UCTCD UCTXCD UCTC UCTFC UCTCD UCTFCD UCT T UC UCTC UCTCD 4. UCT- UCT-4 UCT UCT- UCTX UCTX- UCTX- UCT- UCT UCT- UCT UCT- UCT- UCTX UCTX- T TX T T TX UC- UC-4 UC UC- UCX UCX- UCX- UC- UC UC- UC UC- UC- UCX UCX UCTC UCTXC UCTC UCTXC UCTCD UCTXCD UCTCD UCTXCD UCTFC UCTC UCTFC UCTFCD UCTCD UCTFCD UCT T UC..... UCTC UCTCD 4 4. UCT-4 UCT UCTX-4 UCTX UCT-4 UCT UCT4- UCT4 UCTX4- UCTX4 UCT4- UCT4 UCT-4 UCT UCT-4 UCTX-4 UCTX UCTX-4 T TX T T4 TX4 T4 T TX UC-4 UC UCX-4 UCX UC-4 UC UC4- UC4 UCX4- UCX4 UC4- UC4 UC-4 UC UC-4 UCX-4 UCX UCX UCTC UCTXC UCT4C UCTX4C UCTC UCTXC UCTCD UCTXCD UCT4CD UCTX4CD UCTCD UCTXCD UCTFC UCTC UCT4FC UCT4C UCTFC UCTFCD UCTCD UCT4FCD UCT4CD UCTFCD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCTJL, UCL) 4. s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available / /

129 Take-up type UCT Cylindrical bore (with set screws) d () ~ 4 mm L With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T4~T TX~TX T~T +.. T~T TX~TX T~T. T~T +... T4~T.. H H H N un H H Form and dimensions of Lc of T4JE and TJE (housing with cast iron covers) are shown below. L N L c T4JE Lc = mm TJE Lc = mm L L haft Dia. Dimensions tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch Unit Housing earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. kn kn mm inch mm inch Open Closed Open Closed d H H H L L L L N N N kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / 4 / / / / / / / / 4 / / 4 4 / / 4 / / / / / / / / 4 / 4 4 / / / / / / / / / / / 4 / / / 4 4 / 4 / / 4 / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~ / / / / 4 4 / UCT-4 UCT UCT-4 UCT- UCT T T UC-4 UC UC-4 UC- UC UCTC UCTCD 4. UCTC UCTFC UCTCD UCTFCD UCTX TX UCX UCTXC UCTXCD 4 /. UCT T UC.... UCTC UCTCD /. UCT- UCT UCTX UCTX- T TX UC- UC.. UCX. UCX UCTC UCTXC UCTCD UCTXCD 4 / 4.. UCTFC UCTFCD UCT T UC.... UCTC UCTCD 4. UCT- UCT T UC- UC UCTC UCTCD UCT T UC UCTC UCTCD. UCT UCT- UCT-4 T UC UC- UC UCT T UC UCTC UCTCD 4. UCT T UC... UCTC UCTCD 4. UCT4 T4 UC UCT4C UCT4CD. UCT T UC. 4.. UCTC UCTCD 4 /.4 UCTC UCTCD UCT T UC UCTC UCTCD. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCTJL, UCL) 4. s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available /....4.

130 Take-up type UCT-E Cylindrical bore (with set screws) d ~ mm L Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T4E~TE TE~TE TXE~TXE TXE~TXE H H H N un L N L L haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H H H L L L L N N N Cr Cr Cu f kg 4 4 / / / / / / / / 4 / 4 / 4 / / 4 / 4 / / 4 / /. /. /. /. /. /. / / / 4 / / / Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X / 4 / 4 / 4 / 4 4 / / / / / 4 / 4 4 / 4 / 4 / 4 / 4 / 4 / UCTE UCT-E UCTE UCT-E UCTE UCT4-E UCT4E UCT-4E UCT-E UCTE UCT-E UCTXE UCTX-E UCT-E UCTE UCT-E UCT-E UCTXE UCTX-E UCTX-E UCT-E UCT-E UCT-E UCTE UCT-E UCTX-E UCTXE UCTX-E UCT-4E UCT-E UCTE UCTX-4E UCTXE UCT-E UCT-E UCT-E UCTE UCTX-E UCTXE UCT-E UCT-E UCTE UCT-E UCTX-E UCTXE UCTX-E UC. UC- UC. T4E UC-.... UC. UC4- UC4. UC-4 TE UC- UC UC- TXE UCX UCX UC- TE UC UC UC- UCX TXE UCX UCX- UC- UC- TE UC UC UC- UCX- TXE UCX UCX- UC-4 TE UC UC TXE UCX-4 UCX UC- TE UC- UC UC TXE UCX- UCX UC- TE UC- UC UC- UCX- TXE UCX UCX-. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCTEL, UCL) 4. s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available.

131 Take-up type UCT-E Cylindrical bore (with set screws) d ~ mm L Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T4E~TE TE~TE TXE~TXE TXE~TXE H H H N un L N L L haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H H H L L L L N N N Cr Cr Cu f kg / / / / / / / / / / / / / / / / / / / 4 / 4 / / / / / / / / / / / /. /. /. /. /. /. / / / / 4 / 4 / 4 / 4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X -R... ~, X~X 4 / 4 / 4 / / / / / / / / / / / / UCT-E UCT-4E UCTE UCT-E UCTXE UCTX-E UCTX-E UCT-E UCTE UCT-E UCT-E UCTXE UCTX-E UCT-4E UCTE UCTX-4E UCTXE UCT4-E UCT4E UCTX4-E UCTX4E UCT-4E UCTE UCT-4E UCTX-4E UCTXE UCTX-4E UCT-E UCTE TE TXE TE TXE TE TXE T4E TX4E TE TXE TE UC- UC-4 UC UC- UCX UCX- UCX- UC- UC UC- UC- UCX UCX- UC-4 UC UCX-4 UCX UC4- UC4 UCX4- UCX4 UC-4 UC UC-4 UCX-4 UCX UCX-4 UC- UC UCTXE TXE UCX UCT-E UCTE UCTXE UCTX-E TE UC- UC TXE UCX UCX s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCTEL, UCL) 4. s for the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Housings of spheroidal graphite iron casting are also available. 4

132 Take-up type UKT Tapered bore (with adapter) d ~ mm L With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T~T TX~TX T~T +.. T~T TX~TX T~T. T~T +... T4~T.. H H H N un H H Form and dimension of Lc of TJE (housing with cast iron covers) are shown below. L c TJE Lc = mm L N L L haft Dia. Dimensions tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch Open Closed Open Closed No. d H H H L L L L N N N kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / 4 4 / 4 / 4 / 4 / 4 / / 4 / / / 4 4 / / / 4 4 / / / 4 4 / / 4 / 4 / 4 / / / / / 4 / / / 4 4 / 4 4 / 4 / / 4 / / / 4 / 4 4 / 4 / 4 / 4 / 4 4 / 4 / 4 / 4 / 4 / / 4 / 4 / 4 / 4 / 4 / 4 / / / UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKTJ + HX, UK + HX) HEX HX HEX HX HEX HX HX HEX HX HEX HX HEX HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX HX HX HEX HX HX HEX UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD / UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKTJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available. 4 / 4 /

133 Take-up type UKT Tapered bore (with adapter) d ~ mm L With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T~T TX~TX T~T +.. T~T TX~TX T~T. T~T +... T4~T.. H H H N un H H Form and dimension of Lc of TJE (housing with cast iron covers) are shown below. L c TJE Lc = mm L N L L haft Dia. Dimensions tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch Unit Housing earing dapter Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. No. ssembly kn kn mm inch mm inch Open Closed Open Closed No. d H H H L L L L N N N kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg / / / 4 4 / / / / 4 / / / / 4 4 / / 4 / / / / / / / 4 / / / / 4 4 / / / 4 / 4 / 4 / 4 / / / 4 4 / 4 4 / / / 4 4 / / / / / / / / / / / / / / / / / / / / / 4 4 / 4 / 4 4 / / 4 4 / 4 / / / / / / / / / / / / UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK UKT T UK UKTX TX UKX UKT T UK HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HEX HX HEX HX HEX UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTC UKTXC UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD UKTCD UKTXCD / 4 / UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFC UKTC UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKTFCD UKTCD UKT T UK HX UKTC UKTCD. UKT T UK UKT T UK UKT T UK HEX HX HEX HX HX HEX UKTC UKTC UKTC UKTCD UKTCD UKTCD UKT4 T4 UK4 H UKT4C UKT4CD. UKT T UK Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~, X~X, ~. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKTJ + HX, UK + HX) HE H UKTC UKTCD UKT T UK H UKTC UKTCD 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKTJL + HX, UKL + HX). For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Housings of spheroidal graphite iron casting are also available / 4 / / /

134 tainless-series take-up type UCT-H Cylindrical bore (with set screws) d ~ mm L With Pressed tainless teel Covers Variations of tolerance of groove width (s), variations of tolerance of distance between both grooves (Hs), and tolerance of symmetry of both groove sides (X) Housing No. s Hs X T4H~H +... H H H N un H L N L L haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass With Pressed tainless teel Covers mm inch No. No. No. Load Ratings Load Limit Unit No. Dimension Mass mm kn kn mm inch Open Closed d H H H L L L L N N N Cr Cr Cu f kg Ends Type End Type s kg 4 4 / 4 / 4 / 4 / / 4 / 4 / / 4 / / 4 / / / / / 4 / 4 / 4 4 / 4 / 4 / 4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of the applicable grease nipple is --UNFN.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit UCT4H T4H UC UCT4HC UCT4HCD 4. UCTH TH UC..... UCTHC UCTHCD 4 /. UCTH TH UC UCTHC UCTHCD. UCTH TH UC..... UCTHC UCTHCD. UCTH TH UC UCTHC UCTHCD. UCTH TH UC UCTHC UCTHCD. UCTH TH UC UCTHC UCTHCD 4.

135 ection steel frame take-up type UCTH Cylindrical bore (with set screws) d ~ mm T L T With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance between centers of bolt holes (Js, Js) Nominal unit code Js Js UCTH~UCTH ±. ±. H J -un J L J J haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm inch inch ize Unit earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass mm No. No. kn kn mm inch mm inch inch Open Closed Open Closed d H L L J J J N T T mm kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg 4 4 / / / / / / / / / / / / 4 4 / 4 / / / / / / / 4 / 4 / 4 / / / / 4 / 4 / / / / 4 / / / 4 4 / 4 4 / 4 / /. /.. / M M M M M M / M / M UCTH- UCTH-- UCTH- UCTH-- UCTH- UCTH4-- UCTH4- UCTH-4- UCTH-- UCTH- UCTH-- UCTH-- UCTH- UCTH-- UCTH-- UCTH-- UCTH-- UCTH-- UCTH- UCTH-- UCTH-4- UCTH-- UCTH- UCTH-- UCTH-- UCTH-- UCTH- UCTH-- UCTH-- UCTH- UCTH-- UCTH-- UCTH-4- UCTH- UCTH-- UCTH-- UCTH- UCTH-- UCTH-- UCTH-4- UCTH- Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCTHJL-, UCL) / 4 / 4 / / M / M UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UC- UC UC- UC UC- UC- UC- UC UC UC-4. UC UC. UC-.4 UC-.4 UC UC.4 UC-. UC-. UC UC-. UC- UC-4 UC UC-.... UC-.4 UC.4 UC-.4 UC-.4 UC-4 UC UCTHC- UCTHC- UCTHC- UCTH4C- UCTHC- UCTHC- UCTHC- UCTHC- UCTHC- UCTHC- UCTHC- UCTHC UCTHC- UCTHCD- UCTHCD- UCTHCD- UCTH4CD- UCTHCD- UCTHCD- UCTHCD- UCTHCD- UCTHCD- UCTHCD- UCTHCD- UCTHCD- UCTHCD / UCTH4FC- UCTHFC- UCTHFC- UCTHFC- UCTHFC- UCTHFC- UCTHFC- UCTHFC- UCTHFC- UCTHFC- 4. If heavy load (Pr /Cr >.), vibration, or impact occurs, contact with JTEKT.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. Tapered bore (with adapter) type products are also available. (Example of Part No. : UKTHJ- + HX, UK + HX) UCTH4FCD- UCTHFCD- UCTHFCD- UCTHFCD- UCTHFCD- UCTHFCD- UCTHFCD- UCTHFCD- UCTHFCD- UCTHFCD- 4 4 / / /

136 Channel steel frame take-up type UCTL Cylindrical bore (with set screws) d ~ 4 mm With Pressed teel Covers With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Nominal unit code Hs Js UCTL4~ ±. ± UCTL, ±. H H H -un 4 4 T T M T J L haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm mm ize Unit earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass No. No. kn kn mm mm mm Open Closed Open Closed d H H H L J N T T kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg M M M M M M M M M M M M M M M M M M M M M M M M UCTL4- UCTL4- UCTL4- UCTL4-4 UCTL- UCTL- UCTL- UCTL-4 UCTL- UCTL- UCTL- UCTL-4 UCTL- UCTL- UCTL- UCTL-4 UCTL- UCTL- UCTL- UCTL-4 UCTL- UCTL- UCTL- UCTL-4 UC4 UC4 UC4 UC4 UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter codes. (ee Table. in P..). Part No. of applicable grease nipples is C--UNF.. s for the triple-lip seal type product (4 and are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCTLJL-, UCL) 4. The unit should be mounted so that load is applied to the frame mounting surface vertically and downward UCTL4C- UCTL4C- UCTL4C- UCTL4C-4 UCTLC- UCTLC- UCTLC- UCTLC-4 UCTLC- UCTLC- UCTLC- UCTLC-4 UCTLC- UCTLC- UCTLC- UCTLC-4 UCTLC- UCTLC- UCTLC- UCTLC-4 UCTLC- UCTLC- UCTLC- UCTLC-4 UCTL4CD- UCTL4CD- UCTL4CD- UCTL4CD-4 UCTLCD- UCTLCD- UCTLCD- UCTLCD-4 UCTLCD- UCTLCD- UCTLCD- UCTLCD-4 UCTLCD- UCTLCD- UCTLCD- UCTLCD-4 UCTLCD- UCTLCD- UCTLCD- UCTLCD-4 UCTLCD- UCTLCD- UCTLCD- UCTLCD UCTLFC- UCTLFC- UCTLFC- UCTLFC-4 UCTLFC- UCTLFC- UCTLFC- UCTLFC-4 UCTLFC- UCTLFC- UCTLFC- UCTLFC-4 UCTLFC- UCTLFC- UCTLFC- UCTLFC-4 UCTLFCD- UCTLFCD- UCTLFCD- UCTLFCD-4 UCTLFCD- UCTLFCD- UCTLFCD- UCTLFCD-4 UCTLFCD- UCTLFCD- UCTLFCD- UCTLFCD-4 UCTLFCD- UCTLFCD- UCTLFCD- UCTLFCD-4. If heavy load (Pr /Cr >.), vibration, or impact occurs, contact with JTEKT.. Tapered bore (with adapter) type bearing units are also available. (Example of Part No. : UKTLJ- + HX, UK + HX). If frame parts need to be corrosion resistant, contact with JTEKT.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit

137 Channel steel frame take-up type UCTU Cylindrical bore (with set screws) d 4 ~ mm With Pressed teel Covers With Cast Iron Covers C With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Nominal unit code Hs Js UCTU~ UCTU~ ± ±. UCTU~ ±. H H -un H H 4-uN H H T T M T J L 4 M T T T J L 4 UCTU UCTU haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm mm ize Unit earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass No. No. kn kn mm mm mm Open Closed Open Closed d H H H L J N T T kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. C--UNF... ~ C-R...,, ~. s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UCTUJL-, UCL) UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU4- UCTU4- UCTU4- UCTU4- UCTU4- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC UC4 UC4 UC4 UC4 UC4 UC UC UC UC UC UC UC UC UC UC UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUFC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTU4C- UCTU4C- UCTU4C- UCTU4C- UCTU4C- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUFCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTU4CD- UCTU4CD- UCTU4CD- UCTU4CD- UCTU4CD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- 4. The unit should be mounted so that load is applied to the frame mounting surface vertically and downward.. If heavy load (Pr /Cr >.), vibration, or impact occurs, contact with JTEKT.. Tapered bore (with adapter) type bearing units are also available. (Example of Part No. : UKTUJ- + HX, UK + HX). If frame parts need to be corrosion resistant, contact with JTEKT.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit

138 Channel steel frame take-up type UCTU Cylindrical bore (with set screws) d ~ mm With Pressed teel Covers With Cast Iron Covers C With Cast Iron Covers C Variations of tolerance of distance from mounting bottom to center of spherical bore (Hs) and variations of tolerance of distance between centers of bolt holes (Js) Nominal unit code Hs Js UCTU~ UCTU~ ± ±. UCTU~ ±. H H -un H H 4-uN H H T T M T J L 4 M T T T J L 4 UCTU UCTU haft Dia. Dimensions olt tandard asic Fatigue Factor With Pressed teel Covers With Cast Iron Covers mm mm ize Unit earing Mass Load Ratings Load Limit Unit No. Dimension Mass Unit No. Dimension Mass No. No. kn kn mm mm mm Open Closed Open Closed d H H H L J N T T kg Cr Cr Cu f Ends Type End Type s kg Ends Type End Type c kg M M M M M M M M M M Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. C--UNF... ~ C-R...,, ~. s for the triple-lip seal type product, supplementary code L follows the Part No. of unit or bearing. (Example of Part No. : UCTUJL-, UCL) UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UCTU- UC UC UC UC UC UC UC UC UC UC UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUC- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- UCTUCD- 4. The unit should be mounted so that load is applied to the frame mounting surface vertically and downward.. If heavy load (Pr /Cr >.), vibration, or impact occurs, contact with JTEKT.. Tapered bore (with adapter) type bearing units are also available. (Example of Part No. : UKTUJ- + HX, UK + HX). If frame parts need to be corrosion resistant, contact with JTEKT.. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit

139 Pressed steel frame take-up type PTH Cylindrical bore (with set screws) d ~ mm L T T Variations of tolerance of distance between centers of bolt holes (Js, Js) Nominal unit code Js Js PTH~PTH ±. ±. H J J J J L -un haft Dia. Dimensions olt Unit earing asic Fatigue Factor Mass mm inch ize No. No. Load Ratings Load Limit mm inch kn kn d H L L J J J N T T mm Cr Cr Cu f kg / / / / / / / / / / /. /. /.. / Remarks. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. If heavy load (Pr /Cr >.), vibration, or impact occurs, contact with JTEKT / M / M / M / M / M PTH PTH PTH PTH PTH

140 Pressed steel frame take-up type NPTH Cylindrical bore (with set screws) d ~ mm J T L J T Variations of tolerance of distance between centers of bolt holes (Js, Js) Nominal unit code Js Js NPTH~NPTH ±. ±. H H J 4-uN L haft Dia. Dimensions olt Unit earing asic Fatigue Factor Mass mm inch ize No. No. Load Ratings Load Limit mm inch kn kn d H H L L J J J N T T mm Cr Cr Cu f kg / / / / / / 4 / 4 / 4 / 4 / 4 / / / / / / / / / /..... / / / / / / / / / / / Remarks. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.. If heavy load (Pr /Cr >.), vibration, or impact occurs, contact with JTEKT. / M / M / M / M / M NPTH NPTH NPTH NPTH NPTH

141 Cartridge type UCC Cylindrical bore (with set screws) d ~ (4) mm r r uh d (4) ~ mm Variations of tolerance of outside diameter (Hs), variations of tolerance of width (s), and tolerance of circumferential runout of outside diameter (Y) Housing No. Hs s Y C4~C. C~C CX~CX C~C ±... CX~CX C~C C~C CX~CX C~C4.4 C~C. C.4 C~C ±...4 C4~C. haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H r Cr Cr Cu f kg haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H r Cr Cr Cu f kg 4 4 / / / / / / / / 4. / / / 4 / UCC UCC- UCC UCC- UCC UCC4- UCC4 UCC-4 UCC- UCC UCC- UCCX UCCX- UCC UCC- UCC- UCC UCC- UCC- UCCX UCCX- UCCX- C4 C CX C C CX UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UCX UCX- UC UC- UC- UC UC- UC- UCX UCX- UCX UCC C UC..... UCC- UCC- UCC- UCC UCC- UCCX- UCCX UCCX- C CX UC- UC- UC- UC UC- UCX- UCX UCX UCC C UC UCC-4 UCC- UCC UCCX-4 UCCX UCC-4 UCC UCC- UCC- UCC- UCC C CX C C UC-4 UC- UC UCX-4 UCX UC-4 UC UC- UC- UC- UC Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCCJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit / 4.4 / / / /.. / / / UCCX- UCCX UCC- UCC UCC- UCC- UCC UCC- UCCX- UCCX UCCX- CX C C CX UCX- UCX UC- UC UC- UC- UC UC- UCX- UCX UCX UCC C UC UCC- UCC-4 UCC UCC- UCCX UCCX- UCCX- UCC- UCC UCC- UCC UCC- UCC- UCCX UCCX- C CX C C CX UC- UC-4 UC UC- UCX UCX- UCX- UC- UC UC- UC UC- UC- UCX UCX UCC C UC UCC-4 UCC UCC-4 UCC UCC4- UCC4 UCC-4 UCC UCC-4 C C C4 C UC-4 UC UC-4 UC UC4- UC4 UC-4 UC UC UCC C UC.... UCC C UC.... UCC- UCC C UC- UC Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCCJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.

142 Cartridge type UCC Cylindrical bore (with set screws) d ~ 4 mm r r uh Variations of tolerance of outside diameter (Hs), variations of tolerance of width (s), and tolerance of circumferential runout of outside diameter (Y) Housing No. Hs s Y C4~C. C~C CX~CX C~C ±... CX~CX C~C C~C CX~CX C~C4.4 C~C. C.4 C~C ±...4 C4~C. haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H r Cr Cr Cu f kg / / / UCC C UC UCC UCC- UCC-4 C UC UC- UC UCC C UC UCC C UC... UCC4 C4 UC4... UCC C UC UCC C UC Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~. s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (L) follows the Part No. of unit or bearing. (Example of Part No. : UCCJL, UCL) 4. For the dimensions and forms of applicable bearings, see the dimensional tables of ball bearing for unit.

143 Cartridge type UKC Tapered bore (with adapter) d ~ () mm r r uh d () ~ mm Variations of tolerance of outside diameter (Hs), variations of tolerance of width (s), and tolerance of circumferential runout of outside diameter (Y) Housing No. Hs s Y C. C~C CX~CX C~C ±... CX~CX C~C C~C CX~CX C~C4.4 C~C. C.4 C~C ±...4 C4~C. haft Dia. Dimensions Unit Housing earing asic Fatigue Factor dapter mm inch inch mm No. No. No. Load Ratings kn Load Limit kn ssembly No. Mass haft Dia. Dimensions Unit Housing earing asic Fatigue Factor dapter mm inch inch mm No. No. No. Load Ratings kn Load Limit kn ssembly No. Mass 4 4 d H r Cr Cr Cu f kg / / / 4 / / 4 / 4 / 4 / 4 / 4 / 4 / UKC C UK UKCX CX UKX...4. UKC C UK...4. UKC C UK...4. UKCX CX UKX..4.. UKC C UK.... UKC C UK..4.. UKCX CX UKX UKC C UK.4... UKC C UK UKCX CX UKX UKC C UK UKC C UK UKCX CX UKX UKC C UK UKC C UK UKCX CX UKX UKC C UK...4. UKC C UK HEX HX HEX HX HEX HX HX HEX HX HEX HX HEX HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKCJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKCJL + HX, UKL + HX). s for the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies d H r Cr Cr Cu f kg / / / / / / / / / / / / UKCX CX UKX UKC C UK UKC C UK UKCX CX UKX UKC C UK.... UKC C UK UKC C UK.... UKC C UK..4. UKC C UK... UKC C UK... HX HX HEX HX HX HEX HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HX HEX UKC C UK HX. UKC C UK 4.4. UKC C UK 4.. UKC C UK.. HEX HX HEX HX HX HEX UKC4 C4 UK4.. H4. UKC C UK 4.. HE H UKC C UK 4.4. H. Remarks. In Part No. of unit and units with covers, fitting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~, X~X, ~ -R... ~. In Part No. of unit with adapters and bearing with adapters, Part No. of applicable adapter follow the Part No. shown in the dimensional tables. (Example of Part No. : UKCJ + HX, UK + HX) 4. s for the triple-lip seal type product ( is the double-lip seal type product), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UKCJL + HX, UKL + HX). s for the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies

144 Hanger type UCH Cylindrical bore (with set screws) d ~ mm C H H H N L Note ) Dimensions N screw hole is apply JI (Taper Pipe Threads) standards. It can not apply to the Parallel Pipe External Thread. lso, below shown the dimensions of Taper Pipe Internal Thread. Female Thread Thread Major Pitch Minor Number pply Nominal Diameter Diameter Diameter of Threads Male of Thread in.4 ( Thread mm ) D D D n Rp R Rp.4.. R Rp R Rp R haft Dia. Dimensions Unit Housing earing asic Fatigue Factor Mass mm inch inch No. No. No. Load Ratings Load Limit mm kn kn d H L H H N ) C Cr Cr Cu f kg 4 4 / / / / / / / / / / / 4 / 4 / 4 / 4 / 4 / / / / 4 / 4 / 4 4 / Rp Rp Rp Rp Rp / Rp / Rp Rp Rp Rp Rp Rp UCH UCH- UCH UCH- UCH UCH4- UCH4 UCH-4 UCH- UCH UCH- UCH- UCH UCH- UCH- UCH- UCH- UCH- UCH UCH- UCH-4 UCH- UCH UCH- UCH- UCH- UCH UCH- UCH- UCH UCH- UCH- UCH-4 UCH UCH- UCH- UCH UCH- UCH- UCH-4 UCH UCH4- UCH4 UCH-4 UCH UCH-4 Remarks. In Part No. of unit and units with covers, fi tting codes follow bore diameter numbers. (ee Table. in P..). Part No. of applicable grease nipples are shown below. --UNF... ~ -R... ~..... H4 H H H H H H H H H H4 H UC UC- UC UC- UC UC4- UC4 UC-4 UC- UC UC- UC- UC UC- UC- UC- UC- UC- UC UC- UC-4 UC- UC UC- UC- UC- UC UC- UC- UC UC- UC- UC-4 UC UC- UC- UC UC- UC- UC-4 UC UC4- UC4 UC-4 UC UC s for the triple-lip seal type product (from to are the double-lip seal type products), supplementary code L (or L) follows the Part No. of unit or bearing. (Example of Part No. : UCHJL, UCL) 4. For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter assemblies.. Tapered bore (with adapter) type products are also available. (Example of Part No. : UKHJ + HX, UK + HX)

145 all bearings for units UC,, U Cylindrical bore (with set screws) d ~ () mm C C -º G C C -º G C -º G C -º G r r r r ud ud ud ud UC UC-L U haft Dia. Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm inch Load Ratings Load Limit No. rg. ore kn kn G d D C r (min.) tandard L Type C Cr Cr Cu f mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg U M U..4. M U UC UCL M. M. M No.-UNF UC- UC-L UNF U UC UCL M4. M. M No.-UNF UC- UC-L UNF U UC UCL M4. M. M UNF UC4- UC4-L UNF U4 4 UC4 UC4L M. M. M UNF UC-4 UC-4L UNF. / UNF UC- UC-L UNF U UC UC UCX UCL UCXL M. M. M. M. M UNF UC- UC-L UNF UC-.... M UCX- UCX-L UNF UNF UC- UC-L UNF U UC UCX UC UCL UCXL M. M. M. M M / UC- UCX- UC-L UCX-L UNF -UNF /-4UNF UC- UCX- UC-L UCX-L UNF -UNF /-4UNF UNF UC- UC-L /-4UNF.4 / UC- UC-L /-4UNF. Remarks. U type product is the compact series ball bearing for unit.. From UC to are the double-lip seal type products (L).

146 all bearings for units UC,, U Cylindrical bore (with set screws) d () ~ () mm C C -º G C C -º G C -º G C -º G r r r r ud ud ud ud UC UC-L U haft Dia. Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm inch Load Ratings Load Limit No. rg. ore kn kn G d D C r (min.) tandard L Type C Cr Cr Cu f mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg / / UC- UC-L /-4UNF M UC UCL M UCX UCXL M UC UCL M UC- UC-L /-4UNF. / UC- UC-L /-4UNF UC- UC-L UNF. / UC- UC-L UNF UCX- UCX-L UNF UC UCX UC UCL UCXL UCL M. M. M UC- UC-L UNF UCX- UCX-L UNF UC- UC-L UNF UC- UC-L M UC-4 UC-4L UNF. / UCX- UCX-L UNF UC- UC-L UNF UC UCX UC UCL UCXL UCL M. M. M UC- UC-L UNF. Remarks. U type product is the compact series ball bearing for unit.. From UC to are the double-lip seal type products (L). - UC- UCX- UC UCX UC - UC- UCX- -4 UC-4 UCX-4 UC-4 UC- UCX- UC- UC UCX UC UC UCX UC UC- UCX- UC-L UCX-L UCL UCXL UCL UC-L UCX-L UC-4L UCX-4L UC-4L UC-L UCX-L UC-L UCL UCXL UCL UCL UCXL UCL UC-L UCX-L M. M M M M. M. M M. M. M. M. M. -UNF /-4UNF /-4UNF -UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF -4UNF -4UNF -4UNF

147 all bearings for units UC,, U Cylindrical bore (with set screws) d () ~ 4 mm C C -º G C C -º G C -º G C -º G r r r r ud ud ud ud UC UC-L U haft Dia. Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm inch Load Ratings Load Limit No. rg. ore kn kn G d D C r (min.) tandard L Type C Cr Cr Cu f mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg / UC- UC-L UNF UCX- UCX-L UNF. / UC- UC-L UNF UC UCX UC UCL UCXL UCL M. M. M UC- UC-L UNF UC UCX UC UCL UCXL UCL M. M. M..4.. / UCX- UCX-L UNF UC- UC-L UNF UC- UC-L M UC UCX UC UCL UCL M. M4. M UC UCL M UCX M UC UCL M.. / UCX UNF UC- UC-L M UCX UNF UC-4 UC-4L M Remarks. U type product is the compact series ball bearing for unit.. From UC to are the double-lip seal type products (L) UC-4 UCX-4 UC-4 UC UCX UC UC4- UCX4- UC4- UC4 UCX4 UC4 UC-4 UCX-4 UC-4 UC UCX UC UC-4 UCX-4 UC-4 UC UC UC4 UC UC UC-4L UCX-4L UC-4L UCL UCXL UCL UC4-L UCX4-L UC4-L UC4L UCX4L UC4L UC-4L UCX-4L UC-4L UCL UCXL UCL UC-4L UCX-4L UC-4L UCL UC4L UCL UCL M. M. M. M. M. M. M. M. M4. M. M. M4. M4. M. M. M. M. M. -UNF -UNF -UNF -UNF -UNF -UNF -UNF -UNF

148 all bearings for units UC-, U- (tainless-series) Cylindrical bore (with set screws) d ~ mm C C -º G C -º G r r ud ud UC- U- haft Dia. Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm Load Ratings Load Limit No. Dia. kn kn G d D C r (min.) C Cr Cr Cu f mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm kg U..4. M U..4. M U M U M U M UC M U M UC M U..... M UC M UC M UC M UC M UC M. Remark series product is the stainless-series ball bearing for unit.

149 G ud C r -F G ud C C r all bearings for units ud C G C r N, -F, N Cylindrical bore (with eccentric locking collar) haft Dia Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm inch Load Ratings Load Limit No. Dia. kn kn G d D C r (min.) Cr Cr Cu f C d mm inch kg mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch F N M. M. M F N UNF -UNF -UNF F N M. M. M N UNF -UNF F N M. M. M F N UNF -UNF -UNF F N M. M. M N UNF -UNF.. / F N UNF -UNF -UNF F N M. M. M F N UNF -UNF -UNF F N /-4UNF /-4UNF /-4UNF F N M M M..4.4 / F N /-4UNF /-4UNF /-4UNF F N /-4UNF /-4UNF /-4UNF F N /-4UNF /-4UNF /-4UNF... / F N /-4UNF /-4UNF /-4UNF... d ~ () mm

150 all bearings for units, -F, N Cylindrical bore (with eccentric locking collar) d () ~ mm C G C C G C C G ud r r ud ud r -F N haft Dia Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm inch Load Ratings Load Limit No. Dia. kn kn G d D C r (min.) C d Cr Cr Cu f mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch mm inch kg / / 4 / 4 / / F N- F N - -F N- -4-4F N-4 - -F N- F N -F N- -F N- -F N- F N -F N- -F N- F N N- -F N- -4F N-4 F N -F N- N- N N-4 N N4- N4 N N M M M M M M M M M M M. M. M. M. M. M. /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF

151 all bearings for units UK Tapered bore (with adapter) d ~ () mm C C C C L ud ud Taper Taper UK UK-L dapter ssembly haft Dia. Dimensions asic Fatigue Factor earing H eries dapter mm inch inch Load Ratings Load Limit No. Mass dapter Dimensions Mass leeve mm kn kn kg ssembly inch No. No. mm d d D L C C Cr Cr Cu f tandard L Type tandard L Type d kg HEX...4 EX UK UKL HX X HEX...4 EX...4. UKX.. HX X HEX...4 EX...4. UK.4. HX X HX.4.. X...4. UK UKL... HEX 4 HEX..... HX.4.. X..4.. UKX.4.. HEX 4 HEX HX.4.. X.... UK HEX 4 HEX HX..4.4 X..4.. UK UKL HX 4 X..... HX..4.4 X UKX.. 4 HX 4 X HX..4.4 X.4... UK UKL.... HX 4 X HEX EX UK UKL.. HX. X Remarks. In Part No. of unit with adapters, Part No. of applicable adapters follow the Part No. shown in the dimensional tables. (Example of Part No. : UK + HX, UKL + HX) UKX UK UKL UK UKL UKX UK UKL UK UKL UKX UK UKL UK UKL UKX. HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HX HEX HX HX HEX X EX X X EX X X EX X EX X EX X EX X EX X EX X X X EX X X EX. dapter series applicable to UK series UK... HX series UKL (or L)... HX series. UK is the double-lip seal type product (L). 4. Inch bore diameter series adapters are also available (see the dimensional tables of adapters assemblies). 4

152 all bearings for units UK Tapered bore (with adapter) d () ~ () mm C C C C L ud ud Taper Taper UK UK-L dapter ssembly haft Dia. Dimensions asic Fatigue Factor earing H eries dapter mm inch inch Load Ratings Load Limit No. Mass dapter Dimensions Mass leeve mm kn kn kg ssembly inch No. No. mm d d D L C C Cr Cr Cu f tandard L Type tandard L Type d kg HX X UK UKL.. HX.4 X HEX EX Remarks. In Part No. of unit with adapters, Part No. of applicable adapters follow the Part No. shown in the dimensional tables. (Example of Part No. : UK + HX, UKL + HX) UK UKL UKX UK UKL UK UKL UKX..... UK UKL UK UKL UKX...4. UK UKL UK UKL UKX.4... UK UKL UK UKL UKX.... UK UKL.. HX HX HX HX HX HX HEX HX HX HEX HX HX HEX HX HX HEX HX HEX HX HEX HX HEX HX HEX HX HEX HX HX HEX HX HEX HX HEX UK UKL.. HX UKX. HX UK UKL.. HX 4.4. UK UKL.. HX. 4.4 UKX. HEX HX X X X X X X EX X X EX X X EX X X EX X EX X EX X EX X EX X EX X X EX X EX X EX. X. X. X. X. EX X. dapter series applicable to UK series UK... HX series UKL (or L)... HX series. UK is the double-lip seal type product (L). 4. Inch bore diameter series adapters are also available (see the dimensional tables of adapters assemblies).

153 all bearings for units UK Tapered bore (with adapter) d () ~ mm C C C C L ud ud Taper Taper UK UK-L dapter ssembly haft Dia. Dimensions asic Fatigue Factor earing H eries dapter mm inch inch Load Ratings Load Limit No. Mass dapter Dimensions Mass leeve mm kn kn kg ssembly inch No. No. mm d d D L C C Cr Cr Cu f tandard L Type tandard L Type d kg HEX... EX 4.. UK UKL... 4 HX X HX X.. UK UKL HEX 4 EX UK4 UK4L.. H HE E 4.. UK UKL.. 4. H UK UKL.. H 4 4. Remarks. In Part No. of unit with adapters, Part No. of applicable adapters follow the Part No. shown in the dimensional tables. (Example of Part No. : UK + HX, UKL + HX). dapter series applicable to UK series UK... HX series UKL (or L)... HX series. UK is the double-lip seal type product (L). 4. Inch bore diameter series adapters are also available (see the dimensional tables of adapters assemblies).

154 all bearings for units ER, R Cylindrical bore (with set screws), Cylindrical outside surface d ~ mm C C C f a r r -º G C r -º G ud r ud ud r ER R haft Dia. Dimensions asic Fatigue Factor earing Dimensions et crew Mass mm inch inch Load Ratings Load Limit No. inch Dia. kg mm kn kn mm G d D C r (min.) r (min.) Cr Cr Cu f (ER) (R) Cc a f D mm inch (ER) (R) / / / / / / / / / ER ER- ER ER- ER ER4- ER4 ER-4 ER- ER ER- ER- ER ER- ER- ER- ER- ER- ER ER- ER-4 ER- ER ER- ER- ER- ER ER- ER- ER ER- ER- ER-4 ER ER- ER- ER ER- ER- R R- R R- R R4- R4 R-4 R- R R- R- R R- R- R- R- R- R R- R-4 R- R M. M. M. M. M. M. M M M M. M. M. -UNF -UNF -UNF -UNF -UNF -UNF -UNF -UNF -UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF /-4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF -4UNF

155 dapter assemblies HX haft Dia. d Dimensions dapter ssembly leeve Lock Nut Washer Mass mm inch inch No. No. No. No. kg mm (H) (HE) (H) (H) d (H) (HE) (H) (H) (H) (HE) (H) (H) (H) (HE) (H) (H)...4 HX HEX X EX N N WX WX.. / HX HEX HX HX X EX X X N N WX WX....4 / HX HX X X N WX HX HEX X EX N N WX WX.. 4 /..4. HX HEX HX X EX X N N WX WX... 4 /..4. HX HEX HX HX X EX X X N N WX WX /..4. HX HEX HX HX X EX X X N N N WX WX WX HX HX X X N N WX WX.4. / HX HEX HX HX X EX X X N N N WX WX WX.... /.4.. HX HEX HX HX X EX X X N N WX WX.... / HX HEX HX X EX X N N WX WX...4 /.. 4. HX HEX HX X EX HX N N WX WX.4..4 / HX HEX HX X EX X N WX HX HEX X EX N N WX WX.. /... HX HEX HX X EX X N N WX WX HX HEX X EX N N WX WX / H4 HE4 H4 4 E4 4 N4 W4... d ~ mm

156 dapter assemblies HX d ~ mm haft Dia. d Dimensions dapter ssembly leeve Lock Nut Washer Mass mm inch inch No. No. No. No. kg mm (H) (HE) (H) (H) d (H) (HE) (H) (H) (H) (HE) (H) (H) (H) (HE) (H) (H) 4 4 / 4 / H H HE HE H H E E N N N W W W

157 Parts and accessories Parts and accessories. Part No. of pressed steel covers Table. Part No. of pressed steel covers for UC type bearings Table. Part No. of pressed steel covers for UK type bearings earing No. haft dia. (mm) Pressed steel cover No. Open ends type Closed end type earing No. haft dia. (mm) Pressed steel cover No. Open ends type Closed end type UC C 4 D 4 UC C 4 D 4 UC C 4 D 4 UC4 C 4 D 4 UC C D UC C D UC C D UC 4 C 4 D UC 4 C 4 D UC C D UC C D UC C D UC C D UC4 C4 D4 UC C D UC C D UC C D UC C D UCX C D UCX C D UCX C D UCX 4 C 4 D UCX 4 C 4 D UCX C D UCX C D UCX C D UCX C4 D4 UCX4 C D UCX C D UCX C D UCX C D UK C D UK C D UK C D UK C D UK 4 C 4 D UK 4 C 4 D UK C D UK C D UK C D UK C D UK C D UK C D UK C D UKX C D UKX C D UKX C D UKX C D UKX 4 C 4 D UKX 4 C 4 D UKX C D UKX C D UKX C4 D4 UKX C D UKX C D UKX C D Remark In the Part No. of the pressed steel covers for shouldered shaft, shaft diameter follows the basic code of the cover. For example, Part No. of the cover for a shaft with mm diameter for UC is C.

158 . Part No. of cast iron covers Table. Part No. of cast iron covers for UC type bearings Table.4 Part No. of cast iron covers for UK type bearings earing No. haft dia. (mm) Cast iron cover No. Open ends type Closed end type Mounting bolt (reference) UC4 4FC 4FD M (4FC ) ) (4FD) ) (M4) UC FC FD M (FC ) ) (FD) ) (M4) UC FC FD M4 UC FC FD M4 UC 4 FC 4 FD UC 4 FC 4 FD UC FC FD M4 UC FC FD UC FC FD UC FC FD M4 UC4 4FC 4FD UC FC FD UC FC FD M UC FC FD UC FC FD UCX XC XD M (XC ) ) (XD) ) UCX XC XD (XC ) ) (XD) ) UC C D M4 UC C D UC C D UC 4 C 4 D M UC 4 C 4 D UC C D UC C D M UC C D UC C D UC4 4C 4D M UC C D UC C D UC C D M UC C D UC C D UC C D M UC C D UC C D UC4 4C 4D M UC C D M UC 4 C 4 D earing No. haft dia. (mm) Cast iron cover No. Open ends type Closed end type Mounting bolt (reference) UK FC FD M (FC ) ) (FD) ) (M4) UK FC FD M4 UK FC FD M4 UK FC FD UK 4 FC 4 FD UK 4 FC 4 FD M4 UK FC FD UK FC FD UK FC FD M4 UK FC FD UK FC FD M UK FC FD UK FC FD UKX XC XD M (XC ) ) (XD) ) UKX XC XD (XC ) ) (XD) ) UK C D M4 UK C D UK C D UK C D M UK 4 C 4 D UK 4 C 4 D UK C D M UK C D UK C D UK C D M UK C D UK C D M UK C D UK C D UK C D M UK C D UK4 4C 4D M UK C D M UK C D Note ) Items in parentheses are applicable to the pillow block type (P), square-flanged type (F), rhombic-flanged type (FL), and the take-up type (T) bearings, and can be mounted to housings with three hexagon socket head cap screws (use four to mount other items). ) Items in parentheses are applicable to the round-flanged type with joint (FC), and can be mounted to housings with three hexagon socket head cap screws (use four to mount other items). Remark In the nominal No. of the cast iron covers for shouldered shaft, shaft diameter follows the basic code of the cover. For example, Part No. of the covers for a shaft with mm diameter for UC is FC.

159 Parts and accessories. Nominal number and dimensions of grease nipples and reducing socket Table. Nominal number and dimensions of grease nipple () Nominal number and dimensions of type grease nipple () Nominal number and dimensions of and C type grease nipples type C type C C pprox..º pprox. º (Width across flats) d l L H (Width across flats) d h L (Width across flats) d h L Nominal grease nipple No. Nominal screw code d Unit : mm H L l -UNF -UNF..4 4 PT PT. Nominal grease nipple No. -UNF C-UNF PT CPT Unit : mm Nominal screw code d Type C h L -UNF PT C C.... Table. Nominal number and dimensions of reducing socket code d H L D d C Nominal No. of reducing socket -UNFPT -UNFPF -UNFPT -UNFPF PTPT PTPF Nominal male thread code d -UNF -UNF PT Nominal female thread code d PT PF PT PF PT PF Unit : mm C D H L....4 Nominal number and dimensions of llen key wrench Table. Nominal number and dimensions of llen key wrench Unit : mm l R pprox. º L Nominal No. of llen key wrench L (pprox.) l (pprox.) R (pprox.)... M M M pplicable set screw M M, M4 M, M 4 M

160 Example of application Koyo all earing units are used in varied equipment, and their performance contributes to technical advantages, automation, and energy-saving of equipment. utomatic warehouse system Many ball bearings are used in automatic warehouse systems for automation and energy-saving of the systems. Delivery center Koyo all bearings of various types incling pillow block type, flange type, take-up type are used in conveyors of delivery centers. elt conveyor utomatic warehouse system elt conveyor driving system Mast driving system elt conveyor driving system Conveyor

161 Example of application oft drink plant ince soft drink manufacturing facilities are frequently cleaned for hygiene control, covered unit, compact series unit, and stainless-series unit are suitable for them. Noodle manufacturing plant Triple-lip seal units or covered units are suitable for locations dusted with a great deal of noodle flour. ottle filling line conveyor Feeding system Pallet driving system Noodle manufacturing machine driving system Mixer driving system 4

162 Tea manufacturing plant Koyo all earings contribute to the automation of tea manufacturing lines and downsizing of tea manufacturing machines. Packing machine Koyo all earings, used in transmission units, cam shafts, and conveyors, contribute to high-efficiency and automation of packing lines. Packing machine Tea processor driving system Cam shaft Conveyor driving system 4

163 Example of application Textile machine Take-up units are suitable for locations where adjustment of distance between shaft axes is required, while hanger units are suitable for locations where the shaft must be hung because of the structure of the machine. Heat treatment system The heat resistant unit is used for applications at a high temperature. Carburizing furnace Carpet pasting system Heat treatment furnace Carpet feeding shaft 4

164 gricultural machine Koyo all earings contribute to downsizing and highperformance of agricultural machines. Triple-lip seal units or covered units are suitable for locations where are subject to a great deal of m water and dusts. Construction machinery Koyo all earings contribute to high-performance and longer service life of construction machinery used under severe environment. mall wagon Concrete mixer eat harvester power transmission system Conveyor Grain mill Conveyor 4

165 Example of application Other applications all earings of various types appropriate for applications and specifications are used. (Round-flanged type with spigot joint) (Take-up type unit) (Pillow block type unit)