Mood 3 Products

Discoloration

Damage ConditionPossible CausesCountermeasures
Discoloration of cages, rolling elements and raceway rings occurs due to their reacting with lubricant at high temperature.
  • Poor lubrication
  • Oil stain due to a reaction with lubricant
  • High temperature
  • Improve the lubrication method

Click a photo to enlarge it

Discoloration 1

Part: Inner ring of an angular contact ball bearing
Symptom: Bluish or purplish Discoloration on raceway surface
Cause: Heat generation due to poor lubrication

Discoloration 2

Part: Inner ring of a 4-point contact ball bearing
Symptom: Bluish or purplish Discoloration on raceway surface
Cause: Heat generation due to poor lubrication

Downloads