Rust

Condition

Rusting or corrosion of bearing ring and rolling element surfaces Sometimes rusted at spacing equal to the distances between the rolling elements

Cause

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

Solution

  • Improvement in sealing effect
  • Periodic inspection of lubricating oil
  • Careful handling of bearing
  • Measures for preventing rusting when not operating for a long period of time