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Needle Bearing Product Overview

Narrated by David Beach Motion Industries Retired. Needle Bearing Product Overview. Agenda. Study of Roller Bearings Begins Here. Loose Rollers Cage & Roller Drawn Cup Solid Race Thrust Products Summary. Needle Bearing Design Overview. Loose Rollers. Loose Needle Rollers.

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Needle Bearing Product Overview

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  1. Narrated by David Beach Motion Industries Retired Needle Bearing ProductOverview Needle Bearing Overview.PPTA

  2. Agenda Study of Roller Bearings Begins Here • Loose Rollers • Cage & Roller • Drawn Cup • Solid Race • Thrust Products • Summary

  3. Needle Bearing DesignOverview Loose Rollers Needle Bearing Overview.PPT

  4. Loose Needle Rollers • 52100 bearing grade steel • Hardened and precision ground • Standard hardness RC 60-64 (or equivalent) • Multiple uses as bearing elements, precision shafts or pins • Diameter: 0.060 – 0.500” (1.52 – 12.7 mm) • Length: 0.100 – 2.000” (2.5 – 50.8 mm) • Length to diameter: 4:1 – 10:1 Needle Bearing Overview.PPT

  5. Full Complement ClearanceRadial (RIC) & Circumferential (cc) • Successful operation of a full complement of rollers not only requires careful selection of radial internal clearance (RIC) but, more importantly, depends on proper circumferential clearance (or the total clearance between rollers) Radial Clearance Circumferential Clearance Needle Bearing Overview.PPT

  6. Loose Needle Rollers • Benefits of loose rollers • Reduced component cost • Reduced cross section • Weight savings • Load-carrying capability • Added design flexibility • Customer requirements • Assembly techniques • Loose roller feeding capabilities • Precision manufacturing & heat treat of raceway surfaces Needle Bearing Overview.PPT

  7. Needle Bearing Design Overview Cage & Roller Assemblies Needle Bearing Overview.PPT

  8. Cage & Roller Assemblies Steel Polymer Needle Bearing Overview.PPT

  9. Cage Functions • Retain Rollers • Makes for a unitized bearing assembly • Easier handling • Easier customer assembly • Easier customer serviceability • Guides Rollers • Outside load zone • Engineered for application Needle Bearing Overview.PPT

  10. Cage Functions • Separate Rollers • Reduces heat and wear at high operating speeds by cutting the relative surface speed in half • Allows for increased lube flow through the bearing Without Cage With Cage Needle Bearing Overview.PPT

  11. Over a Full Complement Easier to handle Less friction Higher speed More debris tolerant More misalignment tolerant Holds more grease Over other Bearings Smaller cross section Easier installation & replacement Lighter weight Size Range 0.2 – 8 inch (5 – 200 mm) bore (Conversion: One Inch = 25.4mm) Cage and Roller - Advantages Needle Bearing Overview.PPT

  12. Needle Bearings Overview Drawn Cup Needle Bearing Overview.PPT

  13. Introduction • Types of inch series drawn cup needle roller bearings B Bearing J Bearing Needle Bearing Overview.PPT

  14. Drawn Cup - Closed End • M-type • Available as either full complement or caged • Allows for a through bored housing • Good contamination resistance Needle Bearing Overview.PPT

  15. Design Features - Seals • Drawn Cup bearings can utilize a seal on one or both ends • Sealed bearings can be pre-greased (greased for life) if the application warrants it SEALED ONE SIDE SEALED TWO SIDES Needle Bearing Overview.PPT

  16. Drawn Cup Roller Clutches,Roller Clutch & Bearing Assemblies • Transmits torque in one direction • Free overrun in opposite direction • Torque applied thru shaft or housing • Available as: • Clutch-only • Clutch bearing assembly • Rollers wedge against internal ramps to transmit torque • Operates on hardened shaft Size Range Inch: 1/8 in. - 1 in. bore Metric: 4mm - 30mm bore Needle Bearing Overview.PPT

  17. Drawn Cup Advantages • Thin cross section • Cost effective • Existing production parts • New parts • Ease of assembly – no retention feature needed • Bearing quality housing not necessary • Housings can be cast iron, aluminum, plastic • Special features • Seals • Closed end • Oil holes for lubrication and debris • Wide size range – drawn cups • .125 – 5.5 inch (3 - 140mm) bore Needle Bearing Overview.PPT

  18. Needle Bearing ProductOverview Part A End of Module Close this window and return to the main menu Needle Bearing Overview.PPT

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