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. CAUSE: Internal clearances reduced – tight adjustment, excessive thrust.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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