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.
The unique properties of ceramic rolling elements can also extend service life and extend grease intervals.
Ceramic hybrid bearings are gaining popularity in the wind energy industry, where service access is difficult and conditions especially harsh.
Advantages of insulated bearings:

• High temperature resistance
• Low friction
• Resistance to vibration
• Electrically insulated
• High reliability
• Long operating life