Damage Condition

Cracks in the raceway ring and rolling elements. Continued use under this condition leads to larger Cracks or Fractures.

Possible Causes

• Excessive interference
• Excessive load, shock load
• Progression of Flaking
• Heat generation and Fretting caused by contact between mounting parts and raceway ring
• Heat generation due to Creep
• Poor taper angle of tapered shaft
• Poor cylindricality of shaft
• Interference with bearing chamfer due to a large shaft corner radius

Countermeasures

• Correct the interference
• Check the load conditions
• Improve the mounting method
• Use an appropriate shaft shape