Mood 3 Products

Insulated Bearings for Traction Motors - Ceramic

Deep Groove Ball Bearing, Ceramic-Coated, 2Comp

To prevent electric pitting, NSK developed Ceramic Coating Insulated Bearings and PPS-Resin Coating Insulated Bearings. The relationship between temperature and insulation resistance of ceramic-insulated bearings was assessed. As a result, no deterioration of insulation resistance up to 110° C was observed.

Condition Description

  • Electrical leakage
  • High Accuracy


  • Railways

Product Features

  • Isolating Items
  • Down-sizing
  • Long life
  • High reliability
  • High strenghten cage


  • Electric pitting protection
  • Proper cage design (DGBB and CRB)
  • Proper contact point design (CRB)
  • Traceability
  • Roughness control of the raceway
  • Roller and ball surface
  • Bearing material are vacuum degassed for high purity
  • Dimensional stability of bearing steel
  • Manufactured to ISO Class 6