UC-SERIES TIMKEN BALL BEARING HOUSED UNITS
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1 UC-SERIES TIMKEN BALL BEARING HOUSED UNITS
2 UC-SERIES TIMKEN BALL BEARING HOUSED UNITS Introduction...3 Features...4 Housing Styles...5 Nomenclature...6 Technical Data...7 Installation...4 HOUSED UNIT TABLES UC Wide Inner Ring Ball Bearings...8 UCP Pillow Block Units...9 UCFL Two-Bolt Flanged Units...0 UCF Four-Bolt Flanged Units... UCFC Piloted Round Flanged Units...2 UCT Take-Up Units...3
3 TIMKEN BALL BEARING HOUSED UNITS DESIGNED FOR OPTIMIZED PERFORMANCE For more than 0 years, Timken innovations continue to keep the world in motion, including the invention of the wide inner ring bearing and the ball bearing housed unit. We continue that innovation by applying our extensive engineering knowledge of bearings, metallurgy, seals and end-user applications to deliver optimized performance from our housed unit product line. Timken ball bearing housed units help improve efficiencies through: INCREASED EQUIPMENT UPTIME AND REDUCED MAINTENANCE COST Bearings with spherical outer rings and precision-machined cast-iron housings help prevent outer ring rotation. Bearings withstand static misalignment of the shaft of +/ 3 degrees. Designed for normal operation between 20 C and 00 C. Wide inner ring ball bearings deliver greater shaft support. High-strength housings are suited for most industrial applications. Bearings are prelubricated and ready for iediate installation. Timken knowledge and support come standard. ROBUST SEALING DESIGNED FOR THE MOST DEMANDING ENVIRONMENTS Precision sealing provides extended bearing life and reduced lubrication leakage. Bonded seal design includes a steel flinger for additional bearing protection. Effective grease retention and reduced debris and moisture ingress improve bearing performance. WIDE RANGE OF READY-TO-MOUNT UNITS Five different housing designs plus replacement inserts are offered in metric and imperial sizes. Set screw locking design allows for easy installation. Extensive range of sizes meets the needs of a wide range of applications. Interchangeable without modification in many applications. Local in-stock availability ensures the service levels you expect. Timken supports your job sites with a team of service engineers available around the world. Their services help extend maintenance cycles and maximize uptime. Timken is your single-source for friction management, with a full range of bearings and related accessories including greases, seals, tools, training, repair service. 3
4 FEATURES Precision formed flinger Provides the first level of protection against contamination. High-performance seal Bonded nitrile rubber seal with an engineered interface to the inner ring. Hardened and ground seal land Helps protect against abrasive wear, extending seal life. Outer ring with spherical outside diameter Engineered fit between bearing and housing to improve bearing life. Lubrication delivery system Precision-machined lubrication groove and holes in the outer ring of the bearing. Engineered balls and cage Steel cage provides effective ball guidance and high temperature service capability. Wide inner ring Improved shaft support over narrow rings, improving bearing life and reducing misalignment. Set screw angle 20-degree angle minimizes inner ring distortion for smoother-running bearing. Cast-iron housing Incorporates ISO 85 Grade 200 (ASTM A48 Class No. 30) cast iron. Premium grease Prelubricated with high-quality lithium-based grease, compatible with most industrial greases. Lubrication hole Precision formed flinger High-performance seal Engineered balls and cage Outer ring with spherical outside diameter Lubrication groove Wide inner ring 4 Hexagon socket set screw Housing (pillow block)
5 HOUSING STYLES Timken offers you the full range of standard series ball bearing housed units with a popular set screw locking mechanism in metric and imperial sizes: UCP PILLOW BLOCK UNITS 2 to 90 ( 2 to 3 2 ) UCF FOUR-BOLT FLANGED UNITS 2 to 90 ( 2 to 3 2 ) UCFL TWO-BOLT FLANGED UNITS 2 to 90 ( 2 to 3 2 ) UCFC PILOTED ROUND FLANGED UNITS 2 to 90 ( 2 to 3 2 ) UCT TAKE-UP UNITS 2 to 85 ( 2 to 3 4 ) UC WIDE INNER RING BALL BEARINGS 2 to 90 ( 2 to 3 2 ) 5
6 NOMENCLATURE UC P 2 05 CONFIGURATIONS TO MEET YOUR NEEDS BALL HOUSED UNITS Standard series wide inner ring, set screw locking mechanism Housing Style Bore Diameter Code HOUSING STYLE Pillow block, two-bolt flange, four-bolt flange, piloted round flange and take-up METRIC BORE SIZES 2 90 INCH BORE SIZES ½ 3½ Ball Bearing Type Series Code BALL BEARING TYPE HOUSING STYLE SERIES BORE DIAMETER CODE METRIC UC Cylindrical bore, spherical outer diameter, set screw locking mechanism P Pillow block unit F Four-bolt flanged unit FL Two-bolt flanged unit 2 Standard industrial series or higher Nominal bore diameter = 2 Nominal bore diameter = 5 Nominal bore diameter = 7 Bore diameter () = bore diameter code x 5 Example: UCF20 = 2 bore (Four-bolt flanged unit) UCP2 = 55 bore (Pillow block unit) T Take-up unit FC Piloted round flanged unit 8 or higher BORE DIAMETER CODE IMPERIAL Nominal bore diameter = bore diameter code/6 Example: UCF20-8 = 8 6 or 2 bore (Four-bolt flanged unit) UCP205-6 = 6 6 or bore (Pillow block unit) 6
7 TECHNICAL DATA The following tables provide useful installation details related to shaft tolerance and torque for set screws and bolts. SUGGESTED SHAFT TOLERANCE () SUGGESTED BOLT MOUNTING TORQUE TABLE SHAFT SIZE SHAFT TOLERANCE TABLE 3 BOLT SIZE TIGHTENING TORQUE Over Incl. M Max. Nm M M lbs () These are for normal service; for heavy loads, high speeds or vertical shaft applications, consult your equipment manufacturer or your local Timken representative. SUGGESTED SET SCREW TIGHTENING TORQUE TABLE 2 SET SCREW SIZE M6 x 0.75 M8 x x.25 M2 x UNF UNF TIGHTENING TORQUE Nm lbs
8 WIDE INNER RING BALL BEARINGS G (2 x 20 ) UC INDUSTRIAL SERIES Basic Load Bearing Ratings Dimensions M Fillet Set Screw Shaft Dia. Designation Dynamic Static Radius Size Weight d C r C 0r D C B S2 C S S r (m) G kn kn kg lbs. lbs. lbs. 2 UC20 M UC UNF UC M UC UNF 7 UC203 M UC UNF UC M UC UNF 25 UC M UC UNF 0.5 UC UNF 8 UC UNF 30 UC M UC UNF UC UNF 4 UC UNF UC UNF UC UNF UC207 M UC UNF UC UNF UC UNF UC208 M UC UNF 6 UC UNF UC UNF.8 45 UC209 M8 7 8 UC UNF UC UNF UC UC UNF 2 UC UNF 2 8 UC UNF UC UC2-24UNF 2 4 UC UNF 60 UC UC UNF UC UNF 2 2 UC UNF.9 65 UC M UC UNF UC M UC UNF UC M UC UNF 3 8 UC UNF UC M UC UNF UC M UC UNF UC M
9 CAST-IRON PILLOW BLOCK UNITS UCP INDUSTRIAL SERIES Basic Load Ratings Dimensions Pillow block Bearing Shaft Dia. Designation Designation Dynamic Static d C r C 0r H L L A H J H2 S B N N kn kn lbs. lbs. 2 UCP20 UC20 UCP20-8 UC UCP202 UC UCP202-0 UC UCP203 UC203 UCP204-2 UC UCP204 UC204 UCP205-4 UC UCP205-5 UC UCP205 UC205 UCP205-6 UC UCP206-8 UC UCP206 UC206 UCP206-9 UC UCP UC UCP UC UCP207-2 UC UCP UC UCP207 UC UCP UC UCP UC UCP UC UCP208 UC UCP UC UCP UC UCP UC UCP209 UC UCP20-30 UC20-30 UCP20-3 UC UCP20 UC20 2 UCP20-32 UC UCP2-32 UC UCP2-34 UC UCP2-35 UC UCP2 UC2 2 4 UCP22-36 UC UCP22 UC UCP22-38 UC UCP22-39 UC UCP23-40 UC UCP23 UC UCP24-44 UC UCP24 UC UCP25-47 UC UCP25 UC25 3 UCP25-48 UC UCP26-50 UC UCP26 UC UCP27-52 UC UCP27 UC UCP28-56 UC UCP28 UC Bolt Size M22 Weight kg lbs
10 CAST-IRON TWO-BOLT FLANGED UNITS A0 UCFL INDUSTRIAL SERIES (2x) Basic Load Two-Bolt Bearing Ratings Dimensions Shaft Dia. Flange Designation Dynamic Static Designation d C r C 0r H J A A AO L A2 S B N kn kn lbs. lbs. 2 UCFL20 UC20 UCFL20-8 UC UCFL202 UC UCFL202-0 UC UCFL203 UC203 UCFL204-2 UC UCFL204 UC204 UCFL205-4 UC UCFL205-5 UC UCFL205 UC205 UCFL205-6 UC UCFL206-8 UC UCFL206 UC206 UCFL206-9 UC UCFL UC UCFL UC UCFL207-2 UC UCFL UC UCFL207 UC UCFL UC UCFL UC UCFL UC UCFL208 UC UCFL UC UCFL UC UCFL UC UCFL209 UC UCFL20-30 UC20-30 UCFL20-3 UC UCFL20 UC20 2 UCFL20-32 UC UCFL2-32 UC UCFL2-34 UC UCFL2 UC UCFL2-35 UC UCFL22-36 UC UCFL22 UC UCFL22-38 UC UCFL22-39 UC UCFL23-40 UC UCFL23 UC UCFL24-44 UC UCFL24 UC UCFL25-47 UC UCFL25 UC25 3 UCFL25-48 UC UCFL26-50 UC UCFL26 UC UCFL27-52 UC UCFL27 UC UCFL28-56 UC UCFL28 UC Bolt Size M22 M22 M22 Weight kg lbs
11 CAST-IRON FOUR-BOLT FLANGED UNITS AO UCF INDUSTRIAL SERIES (4x) Basic Load Four-Bolt Bearing Ratings Dimensions Shaft Dia. Flange Designation Dynamic Static Designation d C r C 0r L J A A AO S B A2 N kn kn lbs. lbs. 2 UCF20 UC20 UCF20-8 UC UCF202 UC UCF202-0 UC UCF203 UC203 UCF UC UCF-204 UC204 UCF205-4 UC UCF205-5 UC UCF205 UC205 UCF205-6 UC UCF206-8 UC UCF206 UC206 UCF206-9 UC UCF UC UCF UC UCF207-2 UC UCF UC UCF207 UC UCF UC UCF UC UCF UC UCF208 UC UCF UC UCF UC UCF UC UCF209 UC UCF20-30 UC20-30 UCF20-3 UC UCF20 UC20 2 UCF20-32 UC UCF2-32 UC UCF2-34 UC UCF2 UC UCF2-35 UC UCF22-36 UC UCF22 UC UCF22-38 UC UCF22-39 UC UCF23-40 UC UCF23 UC UCF24-44 UC UCF24 UC UCF25 UC UCF25-47 UC UCF25-48 UC UCF26-50 UC UCF26 UC UCF27-52 UC UCF27 UC UCF28-56 UC UCF28 UC Bolt Size M2 7 6 Weight kg lbs
12 CAST-IRON PILOTED ROUND FLANGED UNITS UCFC INDUSTRIAL SERIES (4x) Basic Load Round Flange Bearing Ratings Dimensions Shaft Dia. Cartridge Designation Dynamic Static d Designation C r C 0r L J J A A2 A3 A4 H3 S B N kn kn lbs. lbs. 2 UCFC20 UC20 2 UCFC20-8 UC UCFC202 UC UCFC202-0 UC UCFC203 UC203 UCFC204-2 UC UCFC204 UC204 UCFC205-4 UC UCFC205-5 UC UCFC205 UC205 UCFC205-6 UC UCFC206-8 UC UCFC206 UC206 UCFC206-9 UC UCFC UC UCFC UC UCFC207-2 UC UCFC UC UCFC207 UC UCFC UC UCFC UC UCFC UC UCFC208 UC UCFC UC UCFC UC UCFC UC UCFC209 UC UCFC20-30 UC20-30 UCFC20-3 UC UCFC20 UC20 2 UCFC20-32 UC UCFC2-32 UC UCFC2-34 UC UCFC2 UC UCFC2-35 UC UCFC22-36 UC UCFC22 UC UCFC22-38 UC UCFC22-39 UC UCFC23-40 UC UCFC23 UC UCFC24-44 UC UCFC24 UC UCFC25-47 UC UCFC25 UC25 3 UCFC25-48 UC UCFC26-50 UC UCFC26 UC UCFC27-52 UC UCFC27 UC UCFC28-56 UC UCFC28 UC Bolt Size M2 7 6 M2 7 6 Weight kg lbs
13 CAST-IRON TAKE-UP UNITS UCT INDUSTRIAL SERIES Basic Load Take-Up Bearing Ratings Dimensions Shaft Dia. Unit Designation Dynamic Static Designation d C r C 0r H H L2 L A2 A N L H2 S B L3 N N2 A Weight kn kn kg lbs. lbs. lbs. 2 UCT20 UC20 UCT20-8 UC UCT202 UC UCT202-0 UC UCT203 UC203 UCT204-2 UC UCT204 UC204 UCT205-4 UC UCT205-5 UC UCT205 UC205 UCT205-6 UC UCT206-8 UC UCT206 UC206 UCT206-9 UC UCT UC UCT UC UCT207-2 UC UCT UC UCT207 UC UCT UC UCT UC UCT UC UCT208 UC UCT UC UCT UC UCT UC UCT209 UC UCT20-30 UC20-30 UCT20-3 UC UCT20 UC20 2 UCT20-32 UC UCT2-32 UC UCT2-34 UC UCT2 UC UCT2-35 UC UCT22-36 UC UCT22 UC UCT22-38 UC UCT22-39 UC UCT23-40 UC UCT23 UC UCT24-44 UC UCT24 UC UCT25-47 UC UCT25 UC25 3 UCT25-48 UC UCT26-50 UC UCT26 UC UCT27-52 UC UCT27 UC
14 INSTALLATION Ball bearing housed units are available in a wide variety of sizes and housing styles to accoodate a complete range of operating conditions. These cast-iron housings are designed for mounting on straight shafts with a slip fit. The set screw locking mechanism provides ease in mounting.. Ensure that the shaft is clean, free from burrs, straight and of proper diameter. The bearing should not be mounted on a worn section of the shaft. Using shafts with hardness greater than HRC 45 will reduce effectiveness of locking devices. See table on page 7 for suggested shaft tolerances. Grease fitting in lubrication hole 2. Install the supplied grease fitting into the threaded lubrication hole on the housing. Align the bearing in its housing and slide the unit into position on the shaft. 3. Bolt the housing tightly to its mounting supports using an appropriately sized fastener and suggested bolt torque (table 3 on page 7). Flat washers should be used when installing any kind of housed unit. Washers should be properly sized to bolt diameter. 4. Lock the bearing to the shaft by tightening each inner ring set screw incrementally to suggested torque levels (table 2 on page 7). WARNING Failure to observe the following warnings could create a risk of death or serious injury. Proper maintenance and handling practices are critical. Always follow installation instructions and maintain proper lubrication. Overheated bearings can ignite explosive atmospheres. Special care must be taken to properly select, install, maintain and lubricate housed unit bearings that are used in or near atmospheres that may contain explosive levels of combustible gases or accumulations of dust such as grain, coal, or other combustible materials. Consult your equipment designer or supplier for installation and maintenance instructions. Do not use excessive force when mounting or dismounting the unit. Follow all tolerance, fit and torque recoendations. Always follow the Original Equipment Manufacturer s installation and maintenance guidelines. Ensure proper alignment. Never weld housed units. Do not heat components with an open flame. Do not operate at bearing temperatures above 2 C (250 F). CAUTION Failure to follow these cautions may result in property damage. If haer and bar are used for installation or removal of a part, use a mild steel bar (e.g., 00 or 020 grade). Mild steel bars are less likely to cause release of high-speed fragments from the haer or bar or the part being installed or removed. Do not use damaged housed units. FOR ADDITIONAL TIMKEN PRODUCT WARNINGS, VISIT RELUBRICATION Timken ball bearing housed units are prelubricated. However, periodic relubrication is advisable in some applications for which these units are designed. Consult your equipment manufacturer s operating manual for the specific relubrication cycle. General guidelines are found in table 4. GENERAL RELUBRICATION SUGGESTIONS FOR GREASED BEARINGS () TABLE 4 CONDITION RELUBRICATION INTERVAL Indoor service Outdoor service Severe outdoor exposure High contamination/washdown Not required Two/three times per year Once a month Once a week () As a guideline, relubricate until the first indication of grease is observed purging from the bearing. 4
15 TIMKEN OFFERS A WIDE RANGE OF HOUSED UNITS THAT HANDLE DEMANDING INDUSTRIAL OPERATIONS INDUSTRIES AND APPLICATIONS Power Generation (Coal) Mining Aggregate/Cement Metal Mills Pulp and Paper/Sawmills/Forestry Water Treatment Food and Beverage Processing Warehousing Movable Bridges/Structures Industrial Fans/Blowers Timken offers a full line of split- and solid-block housed units for every type of equipment. Easily interchangeable with industry standard designs, the Timken global distribution network makes it easy to get Timken products anywhere in the world fast. SNT PLUMMER BLOCKS Customizable Solution, Uptime Efficiency Timken SNT Pluer Blocks provide excellent bearing protection with castiron housings and a variety of sealing options to help keep grease in and contamination out. SAF PILLOW BLOCKS Optimal Load Capacity, Extended Service Life Timken SAF Pillow Block split-block housed units combine high-performance spherical roller bearings with strong housings to meet the challenges of heavy industry. SPHERICAL ROLLER BEARING SOLID-BLOCK HOUSED UNITS Heavy-duty Protection, High Performance Timken spherical roller bearing solid-block housed units feature rugged cast steel housings, precision-made bearings, and a wide range of shaft-locking options and durable seals. Tough enough to handle extremely harsh conditions. TYPE E TAPERED ROLLER BEARING HOUSED UNITS Improved Reliability, Enhanced Performance Timken Type E tapered roller bearing housed units offer a significantly longer design life compared to current industry-leading designs utilizing standard Timken bearings. BALL BEARING HOUSED UNITS Easy Installation, Flexible Options Timken ball bearing housed units are available in a wide variety of types and sizes to accoodate a complete range of industrial applications and operating conditions.
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