Cam Followers (Stud Type Track Rollers) Roller Followers (Yoke Type Track Rollers)
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- Preston Pope
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1 am Followers (Stud Type Track Rollers) Roller Followers (Yoke Type Track Rollers) Worldwide Sales Offices NSK Ltd.-Headquarters, Tokyo, Japan ASIA BUSINESS STRATEGI IVISION-HEAQUARTERS tel: INUSTRIAL MAHINERY BEARINGS IVISION-HEAQUARTERS tel: AUTOMOTIVE IVISION-HEAQUARTERS tel: NEELE ROLLER BEARINGS STRATEGI tel: IVISION-HEAQUARTERS PREISION MAHINERY & PARTS tel: IVISION-HEAQUARTERS Africa South Africa: NSK South Africa (Pty) Ltd. Johannesburg tel: Asia and Oceania Australia: NSK Australia Pty. Ltd. Melbourne tel: hina: NSK Hong Kong Ltd. Hong Kong tel: Kunshan NSK o., Ltd. Kunshan Plant tel: Guizhou HS NSK Bearings o., Ltd. Anshun Plant tel: NSK Steering Systems ongguan o., Ltd. ongguan Plant tel: Zhangjiagang NSK Precision Machinery o., Ltd. Jiangsu Plant tel: Timken-NSK Bearings (Suzhou) o., Ltd. Jiangsu Plant tel: NSK hina Technology enter Jiangsu tel: NSK (Shanghai) Trading o., Ltd. Shanghai tel: NSK Representative Offices Beijing tel: Shanghai tel: Guangzhou tel: Anshun tel: hengdu tel: NSK (hina) Investment o., Ltd. Shanghai tel: India: Rane NSK Steering Systems Ltd. hennai Plant tel: , , , NSK Ltd. India Blanch Office hennai tel: , , 3067 Indonesia: PT. NSK Bearings Manufacturing Indonesia Jakarta Plant tel: PT. NSK Indonesia Jakarta tel: Korea: NSK Korea o., Ltd. Seoul tel: hangwon Plant tel: Malaysia: NSK Bearings (Malaysia) Sdn. Bhd. Kuala Lumpur tel: NSK Micro Precision (M) Sdn. Bhd. Malaysia Plant tel: New Zealand: NSK New Zealand Ltd. Auckland tel: Philippines: NSK Representative Office Manila tel: Singapore: NSK International (Singapore) Pte Ltd. Singapore tel: NSK Singapore (Pte) Ltd. Singapore tel: Taiwan: Taiwan NSK Precision o., Ltd. Taipei tel: Thailand: NSK Bearings (Thailand) o., Ltd. Bangkok tel: ~58 NSK Bearings Manufacturing (Thailand) o., Ltd. honburi Plant tel: ~ SIAM NSK Steering Systems o., Ltd. hachoengsao Plant tel: ~350 NSK Asia PacificTechnology enter (Thailand) o., Ltd. honburi tel: ~ Europe NSK Europe Ltd. (European Headquarters) Maidenhead, U.K. tel: France: NSK France SAS Paris tel: Germany: NSK eutschland GmbH üsseldorf tel: NSK Precision Europe GmbH üsseldorf tel: NSK Steering Systems Europe Ltd. Stuttgart tel: Neuweg Fertigung GmbH Munderkingen tel: Italy: NSK Italia S.P.A. Milano tel: Industria uscinetti SPA Torino Plant tel: Netherlands: NSK European istribution entre B.V. Tilburg tel: Poland: NSK Europe Ltd. Warsaw Liaison Office Warsaw Liaison tel: , 1526 NSK Iskra S.A. Kielce tel: NSK European Technology enter, Poland Office Kielce tel: Spain: NSK Spain S.A. Barcelona tel: Turkey: NSK Bearings Middle East Trading o., Ltd. Istanbul tel: United Kingdom: NSK Bearings Europe Ltd. Peterlee Plant tel: NSK European Technology entre Newark tel: NSK UK Ltd. Newark tel: NSK Steering Systems Europe Ltd. oventry tel: North and South America NSK Americas, Inc. (American Headquarters) Ann Arbor, Michigan, U.S.A. tel: Argentina: NSK Argentina SRL Buenos Aires tel: Brazil: NSK Brasil Ltda. São Paulo tel: anada: NSK anada Inc. Toronto tel: Mexico: NSK Rodamientos Mexicana, S.A. de.v. Mexico ity tel: , , United States of America: NSK orporation Ann Arbor tel: Sales Offices: Ann Arbor, Michigan tel: erritos tel: NSK American Technology enter Ann Arbor tel: NSK Precision America, Inc. hicago tel: NSK Steering Systems America, Inc. Bennington, Vermont tel: NSK Latin America Inc. Miami tel: High-quality products with long life and proven reliability. These series of cam followers and roller followers significantly improve cost efficiency. NSK Ltd. has a basic policy not to export any products or technology designated as controlled items by export-related laws. When exporting the products in this brochure, the laws of the exporting country must be observed. Specifications are subject to change without notice and without any obligation on the part of the manufacturer. Every care has been taken to ensure the accuracy of the data contained in this brochure, but no liability can be accepted fony loss or damage suffered through errors or omissions. We will gratefully acknowledge any additions or corrections. For more information about NSK products, please contact: Printed on 100% recycled paper. AT. No.E Printed in Japan NSK Ltd. 1991
2 Significantly improve cost efficiency with long operating life and maintenance-free operation. am Followers and Roller Followers 1. Long life 2. Maintenance-free 3. Resistant to heavy impact load 4. Match customer needs A special thrust washer with improved anti-seizure properties of the sliding surface (bearing interior) is utilized. Labyrinth seals enable maintenance-free operations. A thick outer ring and crowned rollers provide resistance to shock loads. Available in two standard types to match customer needs: with-cage type for high-speed applications, or full-complement type for high-load applications. 1 2
3 am Followers am Followers am followers are available in two types; one with a cage for high speed, and the other with a full complement for heavy loads. In the cam follower with seals, a special thrust washer is employed for the sliding surface inside the bearing to improve heat-seizure resistance. Labyrinth sealing also ensures maintenance-free operation. am Followers (Stud Type Track Rollers) 3. Specification Number Example (Metric): - Omitted: Stud head with screwdriver slot B: Stud head with hexagonal socket FR FRS FJ FJS B E P 16 R Omitted: Outer ring has a cylindrical outside surface. R: Outer ring has a spherical outside surface. Outside diameter of outer ring in mm Omitted: Without bushing E: With eccentric bushing Omitted: Stud end straight hole P: With threaded end of stud lubrication hole Example Without seal With seal FRE-16 FJSB-16 FJSP-16 FRSBE-16R Full complement, with screwdriver slot and eccentric bush. Outside diameter of outer ring is 16 mm. With cage, seal/thrust washer, and hexagonal socket. Outside diameter of outer ring is 16 mm. With cage, seal/thrust washer, and threaded end of stud lubrication hole. Outside diameter of outer ring is 16 mm. Full complement, with seal/thrust washer, hexagonal socket, and eccentric bushing. The outer ring has an outside diameter of 16mm and a spherical outside surface. 1. Types am followers are available in the standard types shown in Table 1. These standard bearings have a screwdriver slot built into the stud head, while the outer rings have a cylindrical outside surface. am followers, which are equipped with a thick outer ring, crowned rollers, and a stud with a hardened reaceway surface, are especially tough and can sustain shock loads. Example (Inch): - Omitted: Stud head with screwdriver slot B: Stud head with hexagonal socket R RS B E 8 Outside diameter of outer ring in 1/16-inch units Metric ode FR FRS FJ FJS Table 1 Bearing Types etails Full complement, without seal Full complement, with seal and thrust washer With cage, without seal With cage, seal, and thrust washer Example RE-8 RSB-8 RSBE-8 Omitted: Outer ring has a cylindrical outside surface. : Outer ring has a spherical outside surface. Omitted: Without bushing E: With eccentric bushing Full complement, with screwdriver slot and eccentric bushing. Outside diameter of outer ring is mm (8/16 inch). Full complement, with seal/thrust washend hexagonal socket. Outside diameter of outer ring is mm (8/16 inch). Full complement, with seal/thrust washer, hexagonal socket, and eccentric bushing. The outer ring has an outside diameter of mm (8/16 inch) and a spherical outside surface. 3 R Full complement, without seal Inch RS Full complement, with seal and thrust washer Bearings of the following unique specifications are available for manufacture upon request: 2. Special Specifications (1) Hexagonal socket on the stud head (refer to the Bearing Table) (2) Regular stud type with eccentric bushing stud (refer to the Bearing Table) (3) Threaded end of stud lubrication hole (refer to the Bearing Table) (4) An outer ring with a spherical outside surface (refer to page 4) These specifications are indicated in the bearing number. Please use the as indicated on page 4 when placing orders. In addition to the above, products with their exposed surfaces treated with a black oxide layer to enhance corrosion resistance, as well as products of special shapes and specifications, can also be manufactured. Please contact NSK for further details. 4. Spherical Radius of Outer Ring Spherical radii for metric bearings are shown in Table 2 and for inch bearings in Table 3. Table 2 Spherical Radius, R, of Outer Ring of Metric Bearings All R R Table 3 Spherical Radius, R, of Inch Bearings ( 1 ) R ( 1 ) R R R-28 R R-30 R R R R R R-40 R R-44 R R-48 R R-52 R R-56 R R-64 R-24 R R-26 R Note ( 1 ) This uses R bearings as an example. However, since dimension series are the same, the R dimensions shown in the above table should also be applied to RS bearings. 4
4 am Followers am Followers 5. Accuracy am followers are manufactured with the dimensional tolerances shown in Table 4. Metric 6. Accessories am followers include a pipe plug. Nut, washer, and grease nipple are available as accessories. Note ( 1 ) Bearings with threaded end of stud lubrication hole Stud diameter under 12 mm, JIS B1575, A-M6F nipple Stud diameter over 12 mm, JIS B1575, A-PT 1/8 nipple Other than bearings with threaded end of stud lubrication hole Press-fit nipple JIS: Japanese Industrial Standard Press-Fit Nipple (Metric) A Inch Type FR, FJ, R A Type FR, FRS, FJ, FJS R, RS Table 5 Part ode of Accessories Pipe Plug E Included Press-Fit Nipple (Inch) All imension Series E B F Running accuracy is subject to ISO lass 0. Table 4 am Follower imensional Tolerances Units: µm Stud iameter eviation, Single Plane Mean Outside iameter eviation, mp eviation of Outer Ring dmp, ylindrical Outside Spherical Outside Width, S or Fitting Tolerance Surface Surface high low high low high low high low Grease Not prepacked FRS, FJS, RS Included Prepacked h Nut Washer According to ISO lass When ordering, please add the part code, shown in Table 5, after the bearing number. Nipple I N Z ( 1 ) Applicable Bearings FR-16~FR-26 FRS-16~FRS-26 FR-30~FR-40 FRS-30~FRS-40 FR-47~FR-90 FRS-47~FRS-90 Applicable Bearings R-12~R-44 RS-12~RS-44 R-48~R-96 RS-48~RS-96 R-8,R-8-1,R-10,R-10-1, RS-8,RS-8-1,RS-10, RS-10-1 Example: FR I N Z A Nut According to ISO lass Nipple Washer B E A E F Applications to Maximize Performance Fitting The recommended fittings for the mounting area of cam follower studs are shown in Table 6. Since cam followers use cantilever mounting, the fitting for the stud and mounting hole should be assembled with as little play as possible. In case there is interference in the fitting of the stud and mounting hole, the center of the stud end should be inserted with a press. The side plate should be securely fixed onto a plane surface, square to the centexis, without play. To sufficiently support the side plate, the dimension of the shoulder should be larger than the value of F shown in the bearing table. Maximum Permissible Load The imum radial load that the cam follower can carry is determined by the bearing strength and shear strength of the stud rather than the load rating for needle bearings. This value is given in the bearing table as the imum permissible load. The cam follower can deliver imum Permissible Track Load The permissible load of the track is determined by compression strength or hardness. The permissible load of the track shown in the bearing table is the value of a track made of steel with a hardness of HR40. Table 7 indicates the permissible load coefficient of the track for each hardness. The permissible load of the track for each hardness can be obtained by multiplying the permissible load of the track shown in the bearing table by the permissible load coefficient of the track corresponding to each hardness. Limiting Speed The cam follower has a bearing with a cage for high speed applications. Its limiting speed is shown in Table 8. Limiting speed for the full-complement bearing type is one-third that Table 8 Limiting Speeds for Metric Bearings with age Bearing Number FJB-10 FJ-12 FJ-16 FJ-19 FJ-22 FJ-26 FJ-30 FJ-32 FJ-35 Limiting Speed Bearing Number FJ-40 FJ-47 FJ-52 FJ-62 FJ-72 FJ-80 FJ-85 FJ-90 Limiting Speed Play in the mounting part should be avoided because it may not only cause inclination of the stud, but also create considerable deflection when a load is imposed. The load would also be unevenly imposed on the rollers due to edge contact between the outer ring and track (on which the outer ring runs). Table 6 Recommended Fitting for Stud Mounting Part Fitting Tolerance of Type Mounting Hole Metric FR, FJ, FRS, FJS JS7 (J7) Inch R, RS F7 strength performance of the stud by mounting securely to the side plate so as to minimize overhang. It is necessary, therefore, to minimize chamfering at the corner of the stud mounting hole and avoid burrs. Table 7 Permissible Load oefficient of Track Hardness (HR) oefficient Hardness (HR) oefficient of the cage-bearing type. For grease lubrication, limiting speed will be 60% of each value shown in the table. Maximum lamp Torque Since the stud of the cam follower receives bending stress and tensile stress from the bearing load, the screw clamp torque should not exceed the value shown in the bearing table. The clamp torque (imum) in the bearing table is the value when the thread is lubricated, and the value when dry should be approximately doubled. Pre-Packed Grease The cam follower with a seal is pre-lubricated with lithium soap-based grease. 5 6
5 am Followers (Metric design) am Followers FR FRS FJ FJS Full omplement Full omplement, Sealed with Thrust Washer With age Sealed, with age and Thrust Washer M 1 B 1 B 3 d B 2 M 2 G 1 M 1 G B E 0 d PT Full omplement FR FRS FRB FRE FRSP PT F 1 imensions of Hexagonal Socket (width across flats) ( 2 ) 2 Shoulder imensions 3 Fillet Radius of Housing FR FJ FRS FJS Boundary imensions d imensions Screw G G 1 B 1 B 2 B 3 M 2 M 1 FJB M FJ M FJB M FR-16 FRS M ( 1 ) FJ-16 FJS M ( 1 ) FR-19 FRS M ( 1 ) FJ-19 FJS M ( 1 ) FR-22 FRS M ( 1 ) FJ-22 FJS M ( 1 ) FR-26 FRS M ( 1 ) FJ-26 FJS M ( 1 ) FR-30 FRS M FJ-30 FJS M FR-32 FRS M FJ-32 FJS M FR-35 FRS M FJ-35 FJS M FR-40 FRS M FJ-40 FJS M FR-47 FRS M FJ-47 FJS M FR-52 FRS M FJ-52 FJS M FR-62 FRS M FJ-62 FJS M FR-72 FRS M FJ-72 FJS M FR-80 FRS M FJ-80 FJS M FR-85 FRS M FJ-85 FJS M FR-90 FRS M FJ-90 FJS M Note ( 1 ) Only the stud head has a lubrication hole. Remarks Standard grease is packed in sealed cam followers, but not in cam followers without seals. Please consult NSK when making a selection. Basic ynamic Load Ratings r Limiting Loads P M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ Notes ( 2 ) Applicable to FRB only. ( 3 ) Applicable to FRE only. ( 4 ) Applicable to FRSP only. Limiting Track Loads Mass (kg) Approx. 1 Eccentric Bushing imensions ( 3 ) B 4 d 1 E Threaded Lubrication hole ( 4 ) ( 5 ) Only the stud head has a threaded lubrication hole. ( 6 ) These values are for when the screw is oiled; they should be approximately doubled when the screw is dry. PT 2 F min 3 Tightening Torque ( 6 ) (N cm) 7 8
6 am Followers (Inch design) am Followers R Full omplement RS Full omplement, Sealed B 1 B 3 M 1 d G 1 M 1 G B E d 1±0.025 M 2 B 2 Full omplement R RS RB RE R RS (mm/inch) Boundary imensions (mm/inch) d (mm/inch) imensions Screw UNF G G 1 B 1 B 2 B 3 M 2 M 1 Basic ynamic Load Ratings r Limiting Loads P Limiting Track Loads Limiting Speed ( 4 ) R-8 RS R-8-1 RS R-10 RS R-10-1 RS R-12 RS R-14 RS R-16 RS R-18 RS R-20 RS R-22 RS R-24 RS R-26 RS R-28 RS R-30 RS R-32 RS R-36 RS R-40 RS R-44 RS R-48 RS R-52 RS R-56 RS R-64 RS RB-80 RSB RB-96 RSB Notes ( 1 ) USN screws are used in place of UNF screws. ( 2 ) UN screws are used in place of UNF screws. ( 3 ) Only the stud head has a lubrication hole. ( 4 ) 60% of this value will be applied for grease lubrication. Remarks Standard grease is packed in sealed cam followers, but not in cam followers without seals. Please consult NSK when making a selection ( 3 ) ( 3 ) / ( 3 ) / ( 3 ) / / / / / / / / / / / / ( 1 ) ( 1 ) / / / / ( 2 ) / 2-12 ( 2 ) Abutment and fillet dimensions, and tightening torque are shown on the next page. 9 10
7 am Followers (Inch design) am Followers Miniature am Follower made of durable, high corrosion-resistant stainless steel ES1 B F Miniature cam followers are made of durable, high corrosion-resistant stainless steel ES1. These are cam followers with a small diametend surface area that can be used in various applications and environments where enhanced resistance to corrosion is required. E d 1±0.025 B 1 FRS RB RE G 1 G F 1 imensions of Hexagonal Socket (width across flats) ( 5 ) 2 Shoulder imensions Mass 1 2 Eccentric Bushing imensions ( 6 ) (kg) R RS F Approx. B 4 d 1 E min 3 Fillet Radius of Housing 3 Tightening Torque ( 7 ) (N cm) d R-8 RS R-8-1 RS R-10 RS R-10-1 RS B 2 R-12 RS R-14 RS R-16 RS R-18 RS R-20 RS R-22 RS R-24 RS R-26 RS R-28 RS R-30 RS R-32 RS R-36 RS R-40 RS R-44 RS R-48 RS R-52 RS R-56 RS R-64 RS RB-80 RSB RB-96 RSB Standard Specifications for Miniature am Followers With age Full omplement FJMB-5 FRMB M FJMB-6 FRMB M FJMB-8 FRMB M FJMB-10 FRMB M FJMB-12 FRMB M FJMB d B 1 B 2 G G 1 Basic ynamic Load Ratings rh 0rH FJMB FJMB FRMB Basic ynamic Load Ratings rh Shoulder imensions F (min) Tightening Torque (N cm) () Limiting Loads P FRMB FRMB Notes ( 5 ) Applicable to RB only. ( 6 ) Applicable to RE only. ( 7 ) These values are for when the screw is oiled; they should be approximately doubled when the screw is dry. FJMB FJMB FJMB Pre-lubricated grease: Lithium soap-based grease is used as lubrication. Accessories: Nut is available as an accessory. Please consult NSK. FRMB FRMB FRMB
8 am Followers am Followers am followers are available in two types; one with a cage for high speed, and the other with a full complement for heavy loads. In the cam follower with seals, a special thrust washer is employed for the sliding surface inside the bearing to improve heat-seizure resistance. Labyrinth sealing also ensures maintenance-free operation. am Followers (Stud Type Track Rollers) 3. Specification Number Example (Metric): - Omitted: Stud head with screwdriver slot B: Stud head with hexagonal socket FR FRS FJ FJS B E P 16 R Omitted: Outer ring has a cylindrical outside surface. R: Outer ring has a spherical outside surface. Outside diameter of outer ring in mm Omitted: Without bushing E: With eccentric bushing Omitted: Stud end straight hole P: With threaded end of stud lubrication hole Example Without seal With seal FRE-16 FJSB-16 FJSP-16 FRSBE-16R Full complement, with screwdriver slot and eccentric bush. Outside diameter of outer ring is 16 mm. With cage, seal/thrust washer, and hexagonal socket. Outside diameter of outer ring is 16 mm. With cage, seal/thrust washer, and threaded end of stud lubrication hole. Outside diameter of outer ring is 16 mm. Full complement, with seal/thrust washer, hexagonal socket, and eccentric bushing. The outer ring has an outside diameter of 16mm and a spherical outside surface. 1. Types am followers are available in the standard types shown in Table 1. These standard bearings have a screwdriver slot built into the stud head, while the outer rings have a cylindrical outside surface. am followers, which are equipped with a thick outer ring, crowned rollers, and a stud with a hardened reaceway surface, are especially tough and can sustain shock loads. Example (Inch): - Omitted: Stud head with screwdriver slot B: Stud head with hexagonal socket R RS B E 8 Outside diameter of outer ring in 1/16-inch units Metric ode FR FRS FJ FJS Table 1 Bearing Types etails Full complement, without seal Full complement, with seal and thrust washer With cage, without seal With cage, seal, and thrust washer Example RE-8 RSB-8 RSBE-8 Omitted: Outer ring has a cylindrical outside surface. : Outer ring has a spherical outside surface. Omitted: Without bushing E: With eccentric bushing Full complement, with screwdriver slot and eccentric bushing. Outside diameter of outer ring is mm (8/16 inch). Full complement, with seal/thrust washend hexagonal socket. Outside diameter of outer ring is mm (8/16 inch). Full complement, with seal/thrust washer, hexagonal socket, and eccentric bushing. The outer ring has an outside diameter of mm (8/16 inch) and a spherical outside surface. 3 R Full complement, without seal Inch RS Full complement, with seal and thrust washer Bearings of the following unique specifications are available for manufacture upon request: 2. Special Specifications (1) Hexagonal socket on the stud head (refer to the Bearing Table) (2) Regular stud type with eccentric bushing stud (refer to the Bearing Table) (3) Threaded end of stud lubrication hole (refer to the Bearing Table) (4) An outer ring with a spherical outside surface (refer to page 4) These specifications are indicated in the bearing number. Please use the as indicated on page 4 when placing orders. In addition to the above, products with their exposed surfaces treated with a black oxide layer to enhance corrosion resistance, as well as products of special shapes and specifications, can also be manufactured. Please contact NSK for further details. 4. Spherical Radius of Outer Ring Spherical radii for metric bearings are shown in Table 2 and for inch bearings in Table 3. Table 2 Spherical Radius, R, of Outer Ring of Metric Bearings All R R Table 3 Spherical Radius, R, of Inch Bearings ( 1 ) R ( 1 ) R R R-28 R R-30 R R R R R R-40 R R-44 R R-48 R R-52 R R-56 R R-64 R-24 R R-26 R Note ( 1 ) This uses R bearings as an example. However, since dimension series are the same, the R dimensions shown in the above table should also be applied to RS bearings. 4
9 am Followers am Followers 5. Accuracy am followers are manufactured with the dimensional tolerances shown in Table 4. Metric 6. Accessories am followers include a pipe plug. Nut, washer, and grease nipple are available as accessories. Note ( 1 ) Bearings with threaded end of stud lubrication hole Stud diameter under 12 mm, JIS B1575, A-M6F nipple Stud diameter over 12 mm, JIS B1575, A-PT 1/8 nipple Other than bearings with threaded end of stud lubrication hole Press-fit nipple JIS: Japanese Industrial Standard Press-Fit Nipple (Metric) A Inch Type FR, FJ, R A Type FR, FRS, FJ, FJS R, RS Table 5 Part ode of Accessories Pipe Plug E Included Press-Fit Nipple (Inch) All imension Series E B F Running accuracy is subject to ISO lass 0. Table 4 am Follower imensional Tolerances Units: µm Stud iameter eviation, Single Plane Mean Outside iameter eviation, mp eviation of Outer Ring dmp, ylindrical Outside Spherical Outside Width, S or Fitting Tolerance Surface Surface high low high low high low high low Grease Not prepacked FRS, FJS, RS Included Prepacked h Nut Washer According to ISO lass When ordering, please add the part code, shown in Table 5, after the bearing number. Nipple I N Z ( 1 ) Applicable Bearings FR-16~FR-26 FRS-16~FRS-26 FR-30~FR-40 FRS-30~FRS-40 FR-47~FR-90 FRS-47~FRS-90 Applicable Bearings R-12~R-44 RS-12~RS-44 R-48~R-96 RS-48~RS-96 R-8,R-8-1,R-10,R-10-1, RS-8,RS-8-1,RS-10, RS-10-1 Example: FR I N Z A Nut According to ISO lass Nipple Washer B E A E F Applications to Maximize Performance Fitting The recommended fittings for the mounting area of cam follower studs are shown in Table 6. Since cam followers use cantilever mounting, the fitting for the stud and mounting hole should be assembled with as little play as possible. In case there is interference in the fitting of the stud and mounting hole, the center of the stud end should be inserted with a press. The side plate should be securely fixed onto a plane surface, square to the centexis, without play. To sufficiently support the side plate, the dimension of the shoulder should be larger than the value of F shown in the bearing table. Maximum Permissible Load The imum radial load that the cam follower can carry is determined by the bearing strength and shear strength of the stud rather than the load rating for needle bearings. This value is given in the bearing table as the imum permissible load. The cam follower can deliver imum Permissible Track Load The permissible load of the track is determined by compression strength or hardness. The permissible load of the track shown in the bearing table is the value of a track made of steel with a hardness of HR40. Table 7 indicates the permissible load coefficient of the track for each hardness. The permissible load of the track for each hardness can be obtained by multiplying the permissible load of the track shown in the bearing table by the permissible load coefficient of the track corresponding to each hardness. Limiting Speed The cam follower has a bearing with a cage for high speed applications. Its limiting speed is shown in Table 8. Limiting speed for the full-complement bearing type is one-third that Table 8 Limiting Speeds for Metric Bearings with age Bearing Number FJB-10 FJ-12 FJ-16 FJ-19 FJ-22 FJ-26 FJ-30 FJ-32 FJ-35 Limiting Speed Bearing Number FJ-40 FJ-47 FJ-52 FJ-62 FJ-72 FJ-80 FJ-85 FJ-90 Limiting Speed Play in the mounting part should be avoided because it may not only cause inclination of the stud, but also create considerable deflection when a load is imposed. The load would also be unevenly imposed on the rollers due to edge contact between the outer ring and track (on which the outer ring runs). Table 6 Recommended Fitting for Stud Mounting Part Fitting Tolerance of Type Mounting Hole Metric FR, FJ, FRS, FJS JS7 (J7) Inch R, RS F7 strength performance of the stud by mounting securely to the side plate so as to minimize overhang. It is necessary, therefore, to minimize chamfering at the corner of the stud mounting hole and avoid burrs. Table 7 Permissible Load oefficient of Track Hardness (HR) oefficient Hardness (HR) oefficient of the cage-bearing type. For grease lubrication, limiting speed will be 60% of each value shown in the table. Maximum lamp Torque Since the stud of the cam follower receives bending stress and tensile stress from the bearing load, the screw clamp torque should not exceed the value shown in the bearing table. The clamp torque (imum) in the bearing table is the value when the thread is lubricated, and the value when dry should be approximately doubled. Pre-Packed Grease The cam follower with a seal is pre-lubricated with lithium soap-based grease. 5 6
10 am Followers (Metric design) am Followers FR FRS FJ FJS Full omplement Full omplement, Sealed with Thrust Washer With age Sealed, with age and Thrust Washer M 1 B 1 B 3 d B 2 M 2 G 1 M 1 G B E 0 d PT Full omplement FR FRS FRB FRE FRSP PT F 1 imensions of Hexagonal Socket (width across flats) ( 2 ) 2 Shoulder imensions 3 Fillet Radius of Housing FR FJ FRS FJS Boundary imensions d imensions Screw G G 1 B 1 B 2 B 3 M 2 M 1 FJB M FJ M FJB M FR-16 FRS M ( 1 ) FJ-16 FJS M ( 1 ) FR-19 FRS M ( 1 ) FJ-19 FJS M ( 1 ) FR-22 FRS M ( 1 ) FJ-22 FJS M ( 1 ) FR-26 FRS M ( 1 ) FJ-26 FJS M ( 1 ) FR-30 FRS M FJ-30 FJS M FR-32 FRS M FJ-32 FJS M FR-35 FRS M FJ-35 FJS M FR-40 FRS M FJ-40 FJS M FR-47 FRS M FJ-47 FJS M FR-52 FRS M FJ-52 FJS M FR-62 FRS M FJ-62 FJS M FR-72 FRS M FJ-72 FJS M FR-80 FRS M FJ-80 FJS M FR-85 FRS M FJ-85 FJS M FR-90 FRS M FJ-90 FJS M Note ( 1 ) Only the stud head has a lubrication hole. Remarks Standard grease is packed in sealed cam followers, but not in cam followers without seals. Please consult NSK when making a selection. Basic ynamic Load Ratings r Limiting Loads P M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) M ( 5 ) R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ R 1/ Notes ( 2 ) Applicable to FRB only. ( 3 ) Applicable to FRE only. ( 4 ) Applicable to FRSP only. Limiting Track Loads Mass (kg) Approx. 1 Eccentric Bushing imensions ( 3 ) B 4 d 1 E Threaded Lubrication hole ( 4 ) ( 5 ) Only the stud head has a threaded lubrication hole. ( 6 ) These values are for when the screw is oiled; they should be approximately doubled when the screw is dry. PT 2 F min 3 Tightening Torque ( 6 ) (N cm) 7 8
11 am Followers (Inch design) am Followers R Full omplement RS Full omplement, Sealed B 1 B 3 M 1 d G 1 M 1 G B E d 1±0.025 M 2 B 2 Full omplement R RS RB RE R RS (mm/inch) Boundary imensions (mm/inch) d (mm/inch) imensions Screw UNF G G 1 B 1 B 2 B 3 M 2 M 1 Basic ynamic Load Ratings r Limiting Loads P Limiting Track Loads Limiting Speed ( 4 ) R-8 RS R-8-1 RS R-10 RS R-10-1 RS R-12 RS R-14 RS R-16 RS R-18 RS R-20 RS R-22 RS R-24 RS R-26 RS R-28 RS R-30 RS R-32 RS R-36 RS R-40 RS R-44 RS R-48 RS R-52 RS R-56 RS R-64 RS RB-80 RSB RB-96 RSB Notes ( 1 ) USN screws are used in place of UNF screws. ( 2 ) UN screws are used in place of UNF screws. ( 3 ) Only the stud head has a lubrication hole. ( 4 ) 60% of this value will be applied for grease lubrication. Remarks Standard grease is packed in sealed cam followers, but not in cam followers without seals. Please consult NSK when making a selection ( 3 ) ( 3 ) / ( 3 ) / ( 3 ) / / / / / / / / / / / / ( 1 ) ( 1 ) / / / / ( 2 ) / 2-12 ( 2 ) Abutment and fillet dimensions, and tightening torque are shown on the next page. 9 10
12 am Followers (Inch design) am Followers Miniature am Follower made of durable, high corrosion-resistant stainless steel ES1 B F Miniature cam followers are made of durable, high corrosion-resistant stainless steel ES1. These are cam followers with a small diametend surface area that can be used in various applications and environments where enhanced resistance to corrosion is required. E d 1±0.025 B 1 FRS RB RE G 1 G F 1 imensions of Hexagonal Socket (width across flats) ( 5 ) 2 Shoulder imensions Mass 1 2 Eccentric Bushing imensions ( 6 ) (kg) R RS F Approx. B 4 d 1 E min 3 Fillet Radius of Housing 3 Tightening Torque ( 7 ) (N cm) d R-8 RS R-8-1 RS R-10 RS R-10-1 RS B 2 R-12 RS R-14 RS R-16 RS R-18 RS R-20 RS R-22 RS R-24 RS R-26 RS R-28 RS R-30 RS R-32 RS R-36 RS R-40 RS R-44 RS R-48 RS R-52 RS R-56 RS R-64 RS RB-80 RSB RB-96 RSB Standard Specifications for Miniature am Followers With age Full omplement FJMB-5 FRMB M FJMB-6 FRMB M FJMB-8 FRMB M FJMB-10 FRMB M FJMB-12 FRMB M FJMB d B 1 B 2 G G 1 Basic ynamic Load Ratings rh 0rH FJMB FJMB FRMB Basic ynamic Load Ratings rh Shoulder imensions F (min) Tightening Torque (N cm) () Limiting Loads P FRMB FRMB Notes ( 5 ) Applicable to RB only. ( 6 ) Applicable to RE only. ( 7 ) These values are for when the screw is oiled; they should be approximately doubled when the screw is dry. FJMB FJMB FJMB Pre-lubricated grease: Lithium soap-based grease is used as lubrication. Accessories: Nut is available as an accessory. Please consult NSK. FRMB FRMB FRMB
13 Roller Followers Roller Followers The roller follower with a thick-wall outer ring and crowned roller has a large load capacity which enables it to carry shock loads. It is easy to handle because of its non-separating features, and widely used in such applications as track rollers, cams, and rockerms. Roller Followers (Yoke Type Track Rollers) Without seal With seal 1. Types Roller followers are available in the types shown in Table 1. All of the bearings in Table 1 have a cylindrical outside surface. ode Table 1 Bearing Types etails Bearings with the following special specifications are available and can be manufactured upon request: FYR Full complement, without seal Special specifications: Outer ring with a spherical exterior Full complement, with seal FYRS In this case, your order should be placed as follows: and thrust washer ➀ For metric bearings, R should be added to the end of Metric FYJ With cage, without seal the bearing number. Example: FYR-5R, FYJ-5R, FYRS-5R, FYJS-5R FYJS With cage, seal, and ➁ For inch bearings, should be added to the end of the thrust washer bearing type code. YR Full complement, without seal Example: YR-12, YRS-12 Inch Spherical radius of outer ring is shown in Table 4 and 6. Full complement, with seal YRS and thrust washer Exposed surface treated with a black oxide layer In addition to the above, products of special shapes and specifications are available and can be manufactured to order. Please contact NSK for further derails. 2. Accuracy Metric roller followers are manufactured in compliance with ISO lass 0, and inch followers in compliance with the with ISO lass 0 in both cases. eviations for the above apply to the bearings before surface treatment. tolerances shown in Table 2. Running accuracy complies 3. Applications to Maximize Performance Fitting Roller followers are generally used with a transition or loose fit for the shaft because their outer ring rotates. With heavy loads, however, it is recommended to harden the shaft and provide a tight fit. In order to prevent the bearing from moving in the axial direction, both ends of the inner ring should be securely fixed to the plane surface, square to the centexis. To sufficiently support the side plate, the dimension of the shoulder should be larger than the value of F in the bearing table. Permissible Track Load Permissible track load values are the same as those for cam followers. Please refer to the explanation on permissible track load on page 6. Spherical Radius of Outer Ring Outside Spherical radii for metric bearings are shown in Table 4 and for inch bearings in Table 6. Table 4 Spherical Radius, R, of Metric Bearings Outside R All R Table 6 Spherical Radius, R, of Inch Bearing Outside ( 1 ) R ( 1 ) R YR-12 YR-14 YR-16 YR-18 YR YR-32 YR-36 YR-40 YR-44 YR Table 3 Recommended Shaft Fittings Load Fitting Tolerance of Shaft Light Load/Normal Load g6 or h6 Heavy Load k6 Pre-Packed Grease Roller followers with seals are pre-lubricated with lithium soap-based grease. Limiting speed The roller follower has a bearing with a cage for high speed applications. Its limiting speed is shown in Table 5. Limiting speed for the full-complement bearing type is onethird of the value shown in Table 5. For grease lubrication, limiting speed is 60% of each value shown in the table. Table 5 Limiting Speed for Metric Bearing with age Limiting Speed FYJ FYJ FYJ FYJ FYJ FYJ FYJ FYJ FYJ Nominal Bore iameter, d Single Plane Mean Bore iameter eviation, dmp Note ( 1 ) Metric bearings have the same dimension tolerance. Table 2 Tolerances for Inch Bearings Units: µm Single Plane Mean Outside iameter eviation, mp ylindrical Outside Surface high low 0 25 Spherical Outside Surface ( 1 ) over incl. high low high low eviation of Outer Ring Width, S high low eviation of Overall Inner Ring Width, B S high low YR-22 YR-24 YR-26 YR-28 YR YR-52 YR-56 YR-64 YR-80 YR-96 Note ( 1 ) While YR bearing numbers are listed here, the values of R also apply to YRS bearings FYJ-30 FYJ-35 FYJ-40 FYJ-45 FYJ
14 Roller Followers (Inch) Roller Followers YR YRS Full omplement Full omplement, Sealed with Thrust Washer B B d d F Full omplement Full omplement, Sealed YR YRS YR YRS Boundary imensions d B (mm/inch) (mm/inch) (mm/inch) r Basic ynamic Load Ratings or Limiting Track Loads Limiting Speed ( 1 ) Mass (kg) Approx. Shoulder imensions F min Fillet Radius of Housing YR-12 YRS YR-14 YRS YR-16 YRS YR-18 YRS YR-20 YRS YR-22 YRS YR-24 YRS YR-26 YRS YR-28 YRS YR-30 YRS YR-32 YRS YR-36 YRS YR-40 YRS YR-44 YRS YR-48 YRS YR-52 YRS YR-56 YRS YR-64 YRS YR-80 YRS YR-96 YRS Remarks Standard grease is packed in sealed roller followers, but not in roller followers without seals. Please consult NSK when making a selection. Note ( 1 ) For grease lubrication, limiting speed will be 60% of this value
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