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Cracking

Cracking

Condition Cause Solution
  • Splits, and cracks in bearing rings and, rolling elements.
  • Excessive load
  • Excessive impacts
  • Overheating by creeping and rapid cooling
  • Very loose fit
  • Largo flaking
  1. Examination and improvement of cause of very large load
  2. Prevention of creep
  3. Correction of fit

Photo: Inner ring of spherical roller bearing

  • Inner ring of spherical roller bearing
  • Split of raceway surface in the axial direction
  • The cause is excessive interference fit.

Photo: Fracture of inner ring shown in Photo 3

  • Fracture of inner ring shown in Photo 3
  • Originating point is observed at the middle of the left raceway surface.

Photo: Outer ring of four-row cylindrical roller bearing

  • Outer ring of four-row cylindrical roller bearing
  • Split of raceway surface in the circumferential direction, originated from large flaking.
  • The cause is large flaking.

Photo: Outer ring of angular contact ball bearing

  • Outer ring of angular contact ball bearing
  • Split of raceway surface in the circumferential direction
  • The cause is slipping of balls due to poor lubrication.