| Condition | Cause | Solution |
|---|---|---|
| Hollows in raceway surface produced by solid foreign objects trapped or impacts (False brinelling) | Ingress of solid foreign objects Trapping of flaked particles Impacts due to careless handling |
|
- Inner ring (cut off piece) of self-aligning roller bearing
- Dents on one side of the raceway
- The cause is trapping of solid foreign objects.
- Rollers of spherical roller bearing
- Dents on rolling contact surfaces
- The cause is trapping of solid foreign objects.
- Rollers of tapered roller bearings
- Dents all over rolling contact surfaces. (Temper color at two ends.)
- The cause is foreign objects carried by lubricating oil.
- Inner ring of tapered roller bearing
- Dents on raceway surface
- The cause is trapping of foreign objects.
