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Wheel Bearing Failures

Wheel Bearing Failures. Improper Adjustment. RESULT: Large end of rollers & races are worn, galled and spalled. CAUSE: Internal clearances reduced – tight adjustment, excessive thrust. Improper Adjustment. RESULT: Large end of rollers & races are worn, galled and spalled.

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Wheel Bearing Failures

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  1. Wheel Bearing Failures

  2. Improper Adjustment • RESULT: Large end of rollers & races are worn, galled and spalled. • CAUSE: Internal clearances reduced – tight adjustment, excessive thrust.

  3. Improper Adjustment • RESULT: Large end of rollers & races are worn, galled and spalled. • CAUSE: Internal clearances reduced – tight adjustment, excessive thrust.

  4. Improper Adjustment • RESULT: Large end of rollers & races are worn, galled and spalled. • CAUSE: Internal clearances reduced – tight adjustment, excessive thrust.

  5. Improper Adjustment • RESULT: Small end of rollers & races are worn and spalled. • CAUSE: Loose adjustment.

  6. Misalignment • RESULT: Angled wear of spalling on races. • CAUSE: Cocked installation, improper ring seating, warped shaft.

  7. Misalignment • RESULT: Angled wear of spalling on races. • CAUSE: Cocked installation, improper ring seating, warped shaft.

  8. Misalignment • RESULT: Large end wear opposite small end wear. • CAUSE: Cocked installation, improper ring seating, warped shaft.

  9. Misalignment • RESULT: Large end wear opposite small end wear. • CAUSE: Cocked installation, improper ring seating, warped shaft.

  10. Impact Loading • RESULT: Indented races that can progress to spalling. • CAUSE: Impact load during installation or operation.

  11. Impact Loading • RESULT: Indented races that can progress to spalling. • CAUSE: Impact load during installation or operation.

  12. Contaminated Lubricant • RESULT: Indented and bruised races and rolling elements that can progress to spalling. • CAUSE: Hard particles in lubricant.

  13. Contaminated Lubricant • RESULT: Indented and bruised races and rolling elements that can progress to spalling. • CAUSE: Hard particles in lubricant.

  14. Improper Lubrication • RESULT: Frosting. • CAUSE: Oil film too thin to separate rolling elements and races.

  15. Improper Lubrication • RESULT: Heat discoloration on rolling elements and races. • CAUSE: Inadequate lubrication.

  16. Improper Lubrication • RESULT: Catastrophic failure. • CAUSE: Inadequate lubrication.

  17. Poor Fit in Bore and on Shaft • RESULT: Localized Spalls. • CAUSE: Unsupported outer ring – irregular housing bore.

  18. Poor Fit in Bore and on Shaft • RESULT: Localized Spalls. • CAUSE: Unsupported outer ring – irregular housing bore.

  19. Poor Fit in Bore and on Shaft • RESULT: inner ring cracks during installation. • CAUSE: Excessive press fit.

  20. Poor Fit in Bore and on Shaft • RESULT: Fretted (corroded) and/or polished ID or OD. • CAUSE: Insufficient press fit on shaft or in bore.

  21. Etching • RESULT: Corrosion between rolling elements and races that can progress to spalling. • CAUSE: Moisture.

  22. Etching • RESULT: Corrosion between rolling elements and races that can progress to spalling. • CAUSE: Moisture.

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