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Wheel Bearings

Wheel Bearings. Bearing uses. Pivots Wheels Rotating shafts Oscillating shafts Sliding shafts. BEARING LOAD. RADIAL LOAD - When bearing load is applied in a vertical direction. THRUST LOAD - When bearing load is applied in a horizontal direction

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Wheel Bearings

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  1. Wheel Bearings

  2. Bearing uses • Pivots • Wheels • Rotating shafts • Oscillating shafts • Sliding shafts

  3. BEARING LOAD • RADIAL LOAD - When bearing load is applied in a vertical direction. • THRUST LOAD - When bearing load is applied in a horizontal direction • ANGULAR LOAD - When bearing load is applied in between vertical and horizontal

  4. Radial Load Axial or thrust load Angular Load

  5. Radial load

  6. Angular load

  7. BEARING TERMINOLOGY • INNER RACE • SEPARATOR OR CAGE • ROLLING ELEMENTS • BALLS • ROLLERS • OUTER RACE OR CUP

  8. BEARING TYPES • CYLINDRICAL BALL BEARING • CYLINDRICAL ROLLER BEARING • TAPERED ROLLER BEARING • NEEDLE ROLLER BEARING

  9. Cylindrical Ball bearings • Radial loads only.. • Can be double rows of ball bearings.. • Installing bearing.. • Press the outerrace in a housing.. • Press the inner race on a shaft..

  10. HEAVY LOAD

  11. Can be double rows of ball bearings • For heavy thrust loads • Can with stand thrust loads • Can handle some axial loads

  12. Some FWD use a double tapered bearing. • Designed to handle radial and thrust loads. • Usually not serviceable

  13. FRONT WHEEL DRIVE

  14. Cylindrical Roller Bearings • Designed for Radial load • Can withstand some thrust load

  15. Tapered roller bearings • Excellent capability to handle : • Radial Loads • Thrust Loads • Angular Loads

  16. NEEDLE ROLLER BEARING • Is very compact • Small steel rollers • Thin outer race • Used in steering gears and alternators • Rollers push against each other • For Radial Loads

  17. TYPICAL DISC BRAKE BEARING ASSEMBLY

  18. Bearing Diagnosis • Normal bearing life • Bearing failure

  19. BEARING FAILURES • BENT CAGE • ETCHING • BRINELLING • ABRASIVE ROLLER WATER • GALLING MUST REPLACE RACE AND BEARING AS A SET!!! SERVICE AND SYSTEMS LAB MANUAL PAGE 284, FIG 9-54

  20. BEARING SERVICE • Should use brass drift punch (286L) • Should use bearing driver whenever possible (286C & 291L) • Clean bearing and race • Pack new grease in bearing (289C) • Use high temp grease on disc brake equipped car. (265L)

  21. Adjustment PAGE 291L

  22. Springless seal

  23. Double lip seal

  24. Spring loaded Seal

  25. Seal Replacement • Different brands look different • What is important is: • Match the OD • Match the ID • Some brands have a steel lip and some do not. • (Caution) The steel housing is very thin on some

  26. Remember Not only does the seal need to look good now............ It need to be good enough for the next several thousand miles. Buying new seals are a cheap insurance

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