Spalling

Condition

Score accompanying seizing. Mounting score in axial direction. Scores on roller end face and guide rib-cycloidal scores. Scratches in spinning direction on raceway surface and rolling contact surfaces

Cause

Poor mounting and removing practice. Oil film discontinuation on the contact surface due to excessive radial load, foreign object trapping, or excessive pre-load. Slippage or poor lubrication of rolling elements

Solution

  • Improvement in mounting and removing procedures
  • Improvement in operation conditions
  • Correction of pre-load
  • Selection of adequate lubricant and lubrication system
  • Improvement of sealing efficiency