Ceramic-coated insulated bearings for traction motors

To prevent electric pitting, JXKJ Nine Star Bearing developed ceramic coating insulated bearings. Relationship between temperature and insulation resistance of ceramic coating insulated bearings was assessed. As a result, no deterioration of insulation resistance up to 110° C was observed.

Roller bearings are used in all traction motors for electric engines and electric cars. Usually, cylindrical roller bearings are utilized due to their high speed and heavy-load capabilities, as well as their ease of assembly and disassembly. In the case of small motors, deep groove ball bearings may also be used.

Product Features

• A. Ceramic-coated bearing ring
• B. Optimised thickness of ceramic coating
• C. High durability of the coating due to specific plasma spray process
• D. Acrylic resin layer to seal the coating and to optimise the insulation capability
• E. Available with standard bearing dimensions

Product Benefits

• 1. Electric pitting protection
• 2. High insulation resistance
• 3. High cost efficiency due to increased bearing life
• 4. Cheaper when compared to hybrid bearings
• 5. Special preparation of the housing bore is not required
• 6. Traceability

Applications

• A. Electric Motors
• B. Generators
• C. Electrical machines