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

TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG
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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 1

To view more Timken catalogs, go to www.timken.com/catalogs for interactive versions, or to download a catalog app for your smartphone or mobile device scan the QR code or go to timkencatalogs.squawqr.com. TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG The Timken team applies their know-how to improve the reliability and performance of machinery in diverse markets worldwide. The company designs, makes and markets bearings, gear drives, automated lubrication systems, belts, brakes, clutches, chain, couplings, linear motion products and related power transmission rebuild and repair services.

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 3

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; www.timken.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...

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 4

TIMKEN INTRODUCTION • HOW TO USE THIS CATALOG BALL SCREW SUPPORT BEARINGS Our products and services set the standard in high-speed spindles, ball screws, rotary tables and other demanding applications. Our portfolio includes specialized tapered roller and ball bearings produced to precision classes that deliver operating characteristics necessary for the highest performance. Ball screw support bearings with steep contact angles, available in single row, or in housed units, provide high levels of stiffness and simplified installation for the demands of servo-controlled machinery. Timken®...

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 5

TIMKEN SHELF LIFE AND 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. •• After a product is removed from its packaging, it should be placed into service as soon as possible. •• When removing a product that is not individually packaged from a bulk pack container, the container should be resealed immediately after the...

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 6

A 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. Never spin a bearing with compressed air....

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 7

ENGINEERING The following topics are covered within this section: Bearing Selection Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Applied Loads and Bearing Analysis . . . . . . . . . . . . . . . . . . . . . . . . 25 Bearing Life and System Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Permissible Operating Speed and Lubrication . . . . . . . . . . . . . . . 42 Run-In Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Heat Generation and Dissipation . . . . . . . . . . . . . . . . . . . . . . . . ....

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 8

ENGINEERING BEARING SELECTION PROCESS BEARING SELECTION PROCESS 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. Tapered Roller Bearing (TS Metric) Ball Bearing...

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 9

ENGINEERING BEARING SELECTION PROCESS Stiffness The ability to minimize tool deflection experienced under cutting loads is vital to achieving the accuracy needed to produce finished parts within specified tolerances. Less variance produces better quality and helps keep product scrap levels at a minimum. Bearings have a significant effect on spindle stiffness, due to their deflection under applied load. Because of their internal geometry and rolling element type, tapered roller bearings provide considerably higher stiffness levels as shown in Fig. 3 and 4. Tapered Roller Bearing (TS Metric)...

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 10

BEARING SELECTION PROCESS Accuracy Another key factor in the machine's precision is the runout (rotational accuracy) of the bearing. This affects the geometry and surface finish of the target workpiece. For the ultimate accuracy and repeatability of machine tool motion, Timken® super precision ball bearings offer the best control, with quietness of operation and reduced vibration. To achieve the highest level of precision with increased stiffness and load capacity, multiple ball bearings may be used in sets specifically designed for this purpose. The most widely recognized definition of...

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TIMKEN® FAFNIR® SUPER PRECISION BEARINGS FOR MACHINE TOOL APPLICATIONS CATALOG - 11

BEARING SELECTION PROCESS Timken engineers have at their disposal vast resources of engineering data and application information to select the right bearing class and tune the critical components so that the machine tool achieves its performance objectives. The adjacent table can be considered as a general guideline for common machine tool bearing applications. LOAD CAPACITY Some machining centers, such as rough grinding operations, are strategically designed for higher material removal rates. The need for aggressive feed rates requires higher load-carrying capacities. These loads can be...

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