China Insulated ball bearings

 (1) Two options to prevent electrical piting damage

Electrical pitting often occurs in bearings used in electrical equipment, such as motors and power generators, as a result of current leakage. An electrical current present near a bearing can flow to the inside of the bearing, causing sparks that damage the rolling contact surface, ultimately leading to bearing failure. This electrical pitting and can be prevented with coated bearings or ceramic hybrid bearings.

(2) Coated bearings

Nine Star insulated bearings has been specifically designed to counteract electrical pitting. These bearings are available in ceramic versions that are suited to a variety of applications.

(3) Ceramic hybrid bearings

For especially problematic applications, Nine Star offers ceramic hybrid bearings. Using conventional steel inner and outer rings, silicon nitride rolling elements provide excellent electrical insulation while reducing rotating mass and improving heat dissipation.