HOME > Products & Technology > How-to: Handling & Aftercare: Care and Maintenance of Bearings > Inspection of bearings after operation > Spalling

Spalling

Spalling

Condition Cause Solution
  • 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.
  • 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.
  1. Improvement in mounting and removing procedures
  2. Improvement in operation conditions
  3. Correction of pre-load
  4. Selection of adequate lubricant and lubrication system
  5. Improvement of sealing efficiency

Photo: Inner ring of cylindrical roller bearing

  • Inner ring of cylindrical roller bearing
  • Spalling on rib
  • The cause is excessive load.

Photo: Inner ring of cylindrical roller bearing

  • Inner ring of cylindrical roller bearing
  • Spalling on raceway surface and cone back face rib
  • The cause is poor lubrication.

Photo: Rollers of tapered roller bearing

  • Rollers of tapered roller bearing
  • Cycloidal spalling on the end faces (Scuffing)
  • The cause is poor lubrication.

Photo: Roller of cylindrical roller bearing.

  • Roller of cylindrical roller bearing.
  • Score in axial direction on rolling contact surface caused during mounting.
  • The cause is peer mounting practice.