Electrical pitting often occurs in Insulation on the inner ring Bearings used in electrical equipment, such as motors and power generators, as a result of current leakage. An electrical current present near a Insulation on the inner ring Bearings 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.

Insulation on the inner ring Bearings has been specifically designed to counteract electrical pitting. These bearings are available in both ceramic and resin versions that are suited to a variety of applications. Coating the outer ring of the bearing provides a barrier (capable of resisting at least 100 Megaohms at 500 VDC) against any stray currents that would pass through the bearing.

Insulation on the inner ring Bearings are featured as OEM equipment on wind turbine generators, traction motors for railway cars, and variable speed electric motors in wastewater treatment facilities.