TIMKEN® U SERIES BALL BEARING HOUSED UNIT CATALOG

ABOUT THE TIMKEN COMPANY As a global leader in bearings and power transmission systems, Timken focuses on precise solution design, materials and craftsmanship to deliver reliable and efficient performance that improves productivity and uptime. Timken offers a full range of bearings, belts, chains, couplings, gears and lubricants, along with rebuild and repair services. Timken (NYSE; TKR; wwwtimken.com) applies its proven expertise in metallurgy, tribology and mechanical power transmission to create innovative approaches to customers’ complex needs. Global availability of products and engineering...

TIMKEN OVERVIEW TIMKEN® U SERIES BALL BEARING HOUSED UNITS DESIGNED FOR OPTIMIZED PERFORMANCE For more than 110 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...

TIMKEN OVERVIEW HOW TO USE THIS CATALOG We designed this catalog to help you find the Timken bearings best suited to your equipment needs and specifications. The product tables list many of the bearing types that are specifically used in thrust positions. For other bearing types, please refer to the respective Timken product catalog reference. Timken offers an extensive range of bearings and accessories in both imperial and metric sizes. For your convenience, size ranges are indicated in millimeters and inches. Contact your Timken engineer to learn more about our complete line for the special...

TIMKEN SHELF LIFE / STORAGE SHELF LIFE AND STORAGE OF GREASE-LUBRICATED BEARINGS AND COMPONENTS To help you get the most value from our products, Timken provides guidelines for the shelf life of grease-lubricated ball and roller bearings, components and assemblies. Shelf life information is based on Timken and industry test data and experience. SHELF LIFE Shelf life should be distinguished from lubricated bearing/ component design life as follows: Shelf life of the grease-lubricated bearing/component represents the period of time prior to use or installation. The shelf life is a portion of the...

ENGINEERING The following topics are covered within this section: Housing Styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Product Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Relubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

ENGINEERING HOUSING STYLES HOUSING STYLES Timken offers you the full range of standard and heavy series ball bearing housed units with set screw locking (UC), tapered bore for use with adapter sleeve (UK) and eccentric locking collar (UEL) mechanisms in metric and imperial sizes: PILLOW BLOCK UNITS FOUR-BOLT FLANGED UNITS TWO-BOLT FLANGED UNITS PILOTED ROUND FLANGED UNITS UCFL – 12 mm to 130 mm (½ in. to 4 in.) UELFL – 12 mm to 75 mm (½ in. to 3 in.) UKFL – 20 mm to 80 mm (¾ in. to 3 in.) TAKE-UP UNITS UCT – 12 mm to 140 mm (½ in. to 4 in.) UELT – 12 mm to 75 mm (½ in. to 3 in.) UKT – 20 mm to...

ENGINEERING NOMENCLATURE CONFIGURATIONS TO MEET YOUR NEEDS BALL HOUSED UNITS METRIC BORE SIZES Standard and heavy series – wide inner ring, set screw, tapered bore for use with adapter sleeve and eccentric locking collar mechanisms. INCH BORE SIZES HOUSING TYPES Pillow block, two-bolt flange, four-bolt flange, piloted round flange and take-up, tapped base pillow block. UC P Bearing Insert Code UC – S et screw locking mechanism UEL – Eccentric lockingcollar UK – T apered bore for use with adapter sleeve 2 – standard industrial series 3 – heavy-duty series Inch Diameter Code -8 or higher – Bore...

ENGINEERING PRODUCT INFO PRODUCT INFO 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. Lubrication hole 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...

ENGINEERING PRODUCT INFO High-performance seal Engineered balls and cage Outer ring with spherical outside diameter Lubrication groove Wide inner ring Housing (pillow block) TIMKEN® U SERIES BALL BEARING HOUSED UNIT CATALOG

ENGINEERING INSTALLATION • UC 200 SERIES AND UC 300 SERIES • UK SERIES SET SCREW STYLE UNITS ADAPTER STYLE UNITS Set screw style units are mounted on the shaft with the help of two set screws in the inner ring located at 120 degrees to each other. The set screw locking mechanism provides ease in mounting and is suitable for applications where the shaft rotation is bidirectional. Adapter style units have a tapered bore bearing mounted to the shaft with adapter sleeve assembly, comprised of an adapter sleeve, locknut and lockwasher. This design offers the best shaft concentricity and highest capacity...

ENGINEERING INSTALLATION • UK SERIES • UEL SERIES 7. Bend a tang on the lockwasher into a slot on the locknut to prevent the locknut from loosening. 8. Rotate the shaft by hand while tightening the mounting bolts to make sure the shaft rotates freely. Tighten the housed unit mounting bolts to the recommended bolt tightening torque given in table 5 on page 12. UEL SERIES ECCENTRIC LOCKING COLLAR UNITS The self-locking collar eliminates the need for locknuts, lockwashers, shoulders, sleeves and adapters. For many agricultural and industrial applications, self-locking collars are the easiest housed...