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Part B Cylindrical Roller Bearing Cage Design

Part B Cylindrical Roller Bearing Cage Design. Cage Design. TVP = glass fiber reinforced nylon M = one piece, machined bronze finger or fully milled S = one piece stamped steel (5200 series & HJIR) Pin type. M. S. Pin type. Precision. Typical Precision Classes (Tolerance).

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Part B Cylindrical Roller Bearing Cage Design

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  1. Part B Cylindrical Roller Bearing Cage Design

  2. Cage Design • TVP = glass fiber reinforced nylon • M = one piece, machined bronze finger or fully milled • S = one piece stamped steel (5200 series & HJIR) • Pin type M S Pin type CRB Product Overview

  3. Precision

  4. Typical Precision Classes (Tolerance) ISO 492 Section for metric roller bearings in increasing precision CRB Product Overview

  5. Application Considerations

  6. Application Considerations • Lubrication • Heat generation • Speed/acceleration • Misalignment CRB Product Overview

  7. Lubrication • Bearing features • Lubrication grooves and holes in OD • Face scallops / lube from bore (stationary inner / rotating outer) • Used in multi-row CRB’s • Spiral bore groove • Improved disassembly on roll necks CRB Product Overview

  8. Torque & Heat Generation • Sources of bearing torque • Elastic deformation (roller-raceway contact) • Cage contact • Flange contact • Lubricant viscous forces CRB Product Overview

  9. Heat Generation • By design, generate less heat due to minimal friction • Bearing operating temperature must not exceed 250°F (121°C) • Heat will dissipate by oil flow and conduction/convection/radiation through housing material CRB Product Overview

  10. Speed/Acceleration Considerations • High speeds and acceleration • Concern for large bore and eccentric applications • Lower speeds with light loads • Skid smearing can occur due to lack of roller traction • Min load = 2% of C1 CRB Product Overview

  11. Misalignment • Roller/race profiles • Standard roller/race profiling designed to withstand 0.0005 in/in of misalignment (low to moderate loads) • More complex profiles (MRD) can be used to help reduce edge stresses that develop beyond the defined drops CRB Product Overview

  12. Misalignment • Flange modifications • Flanges can be heightened, tapered, or include special profiles • Lubrication improvements • Increased oil flow rates to insure contact points generate adequate lube film thickness CRB Product Overview

  13. Part Numbering

  14. Cylindrical Roller Bearing (CRB) Part Numbering - Metric Cage Design E.TVP, M, S /XXX Designation CRB Product Overview

  15. Cylindrical Roller Bearing (CRB) Part Numbering • CRB Configurations • NJ = Cylindrical roller radial bearing (2 ribs on outer ring, 1 rib on inner ring) • NU = Cylindrical roller radial bearing (2 ribs on outer ring, cylindrical inner ring) • NUP = Cylindrical roller radial bearing (2 ribs on outer ring, 1 fixed rib and 1 loose rib/flat washer on inner ring) • RNU = Cylindrical roller radial bearing (2 ribs on outer ring, without an inner ring) • Series • 10 = width series 1; diameter series 0 (dimension series 10 • 2 = width series 0; diameter series 2 (dimension series 02) • 22 = width series 2; diameter series 2 (dimension series 22) • 3 = width series 0; diameter series 3 (dimension series 03) • 23 = width series 2; diameter series 3 (dimension series 23) CRB Product Overview

  16. Timken Cylindrical Roller Bearing Product Overview Part B End of Module Close this window and return to the main menu

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