| Condition | Cause | Solution |
|---|---|---|
| Rusting or corrosion of bearing ring and rolling element surfaces Sometimes rusted at spacing equal to the distances between the rolling elements | Ingress of water or corrosive material (such as acid) Condensation of moisture contained in the air. Poor packaging and storing conditions, and handling with bare hands. |
|
- Inner ring of tapered roller bearing
- Rusting on raceway surface spacing equivalent to the distance between rollers. The cause is water in lubricant.
- Outer ring of tapered roller bearing
- Rusting on raceway surface spacing equivalent to the distances between rollers. The cause is water in lubricant. Some points are corroded.
- Roller of spherical roller bearing
- Rust as well as corrosion on rolling contact surface
- Ingress of water
- Inner ring (split type) of self-aligning roller bearing
- Rust and corrosion of the raceway surface
- The cause is ingress of water.
