Contact Us
Damage Condition Possible Causes Countermeasures
Wear occurs due to repeated sliding between the two surfaces.
Fretting occurs at fitting surface and also at contact area between raceway ring and rolling elements.
Fretting corrosion is another term used to describe the reddish brown or black worn particles.
  • Poor lubrication
  • Vibration with a small amplitude
  • Insufficient interference
  • Use a proper lubricant
  • Apply a preload
  • Check the interference fit
  • Apply a film of lubricant to the fitting surface


Click a photo to enlarge it

Fretting 1

Part: Inner ring of a deep groove ball bearing
Symptom: Fretting on the bore surface
Cause: Vibration

Fretting 2

Part: Inner ring of an angular contact ball bearing
Symptom: Fretting over entire circumference of bore surface
Cause: Insufficient interference fit

Fretting 3

Part: Outer ring of a double-row cylindrical roller bearing
Symptom: Fretting on the raceway surface at roller pitch intervals


Bearing Doctor

Guide to prevention and countermeasures for bearing failures


NSK uses third-party services that help us to improve our web site and show you more interesting content. In order to use these services, we need your consent. This can be revoked at any time. More information can be found here Link to privacy policy.