TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS
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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS

Bearing Selection Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Determination of Applied Loads and Bearing Analysis . . . . . . . . . . . . . . . . Bearing Reactions, Load Ratings and Life . . . . . . . . . . . . . . . . . . . . . . . . . . . Permissible Operating Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Run-In Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

TIMKEN MACHINE TOOL CATALOG ABOUT THE TIMKEN COMPANY The leading authority on tapered roller bearings, Timken today applies its deep knowledge of metallurgy, tribology and mechanical power transmission across a variety of bearings and related systems to improve reliability and efficiency of machinery and equipment all around the world. Timken (NYSE: TKR; www.timken.com) engineers, manufactures and markets bearings, gear drives, belts, chain and related products, and offers a spectrum of powertrain rebuild and repair services. To view more Timken catalogs, go to www.timken.com/catalogs for...

Introduction ABOUT THIS CATALOG Timken offers an extensive range of bearings and accessories in both imperial and metric sizes. For your convenience, size ranges are indicated both in millimeters and inches. Contact your Timken sales representative to learn more about our complete line for the special needs of your application. USING THIS CATALOG We are committed to providing our customers with maximum service and quality. This catalog contains dimensions, tolerances and load ratings, as well as an engineering section describing fitting practices for shafts and housings, internal...

TIMKEN MACHINE TOOL CATALOG PURCHASER’S EXCLUSIVE REMEDY/SELLER’S EXPRESS LIMIT OF LIABILITY Purchaser’s exclusive remedy for any warranty claim, or for any claim arising out of the purchase or use of our products, shall be the replacement of said products. We will replace our products, without charge to the purchaser, f.o.b. our point of shipment. We will not be liable for any consequential, incidental, or other damages sustained by purchaser, including but not limited to, loss of profits or revenue, loss of use of product, cost of capital, cost of substituted product, facilities,...

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 anticipated aggregate...

TIMKEN MACHINE TOOL CATALOG Inasmuch as Timken is not familiar with a customer’s particular storage conditions, these guidelines are strongly suggested. However, the customer may very well be required by circumstance or applicable government requirements to adhere to stricter storage requirements. Most bearing types are typically shipped protected with a corrosionpreventive compound that is not a lubricant. Such bearings may be used in oil-lubricated applications without removal of the corrosion-preventive compound. When using some specialized grease lubrication it is advisable to remove...

Bearing Selection Bearing Selection Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Determination of Applied Loads and Bearing Analysis. . . . . 32 Bearing Reactions, Load Ratings and Life . . . . . . . . . . . . . . . . 38 Permissible Operating Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Run-In Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Heat Generation and Dissipation. . . . . . . . . . . . . . . . . . . . . . ....

TIMKEN MACHINE TOOL CATALOG

THE BEARING SELECTION PROCESS TIMKEN® BEARINGS Timken provides an extensive variety of rolling bearing types and sizes – to the extent that customers need not look elsewhere. Knowing that the bearing is often the most critical component within a moving assembly, Timken engineers take great care to ensure the customer is receiving maximum value when a Timken® bearing is selected to perform a given function. With the acquisition of the Fafnir® brand, Timken can provide the proper bearing for virtually any motion-control application. With more than a century of proven experience in bearing...

ENGINEERING Boundary (or fixed) conditions that should be taken into consideration include: • External loads, including radial, thrust, moment, shock and combination loads. • Acceleration and deceleration levels. • Operating temperature range (including extreme limits and thermal cycling). • Other environmental factors, such as humidity, fluids, vibration, debris, magnetic fields. • Spatial constraints. Performance expectations (or desired results) to consider include: • Rotational accuracy and repeatability (e.g., service precision level). • System rigidity (axial or radial stiffness). •...

Tapered roller bearing Thrust tapered roller bearing Cylindrical roller bearing Thrust cylindrical roller bearing Spherical roller bearing Thrust spherical roller bearing Ball bearing Thrust ball bearing Table 1. Relative operating characteristics of various bearing types. TIMKEN MACHINE TOOL CATALOG 11

ENGINEERING TIMKEN® SUPER PRECISION BEARINGS Manufacturers require machine tools that are extremely accurate, reliable and capable of high levels of productivity. A major contribution to the performance of any machine tool is supplied by the rolling bearings used to support the spindles, rotating tables, ball screws and other critical precision positions. A manufactured bearing’s precision level has a major influence on the ability to perform in high-speed applications commonly seen in factory machining environments. Today’s industrial machining environments stress maximum production rates....