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Seizing

Condition Cause Solution
Bearing generates heat and is seized up by heat disabling spinning. Discoloration, softening, and welding of raceway surface, rolling contact surfaces, and rib surface. Dissipation of heat generated by bearing is not enough. Poor lubrication or lubricant improper. Clearance excessively small. Excessive load (or pre-load). Roller skewing and installation error.
  1. Improve dissipation of heat from bearing
  2. Selection of suitable lubricant and determination of optimum lubricant feeding rate.
  3. Prevention of misalignment
  4. improvement in clearance and pre-load
  5. Improvement in operating conditions
Photo 4
  • Inner ring of double row tapered roller bearing
  • Seizing-up discolors and softens inner ring producing stepped wear at spacing equal to distances between the rollers.
  • The cause is poor lubrication.
  • Rollers of double row tapered roller bearing
  • Rollers of same bearing as that of the inner ring shown in Photo 4. Discoloration, spalling, and adhesion due to seizing up on rolling contact surfaces and end faces of rollers.

  • Outer ring of spherical roller bearing
  • Stepped wear due to seizing up of raceway surface.
  • The cause is poor lubrication.
  • Inner ring of tapered roller bearing
  • Large end of the raceway surface and cone back face rib surface are seized up.
  • The cause is poor lubrication.


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