A difference in electrical potential between the outer and inner ring of a rolling bearing can lead to a damaging electric current. Electrically insulated rolling bearings feature electrical insulation that is built into the bearing, providing reliable protection against current passage and electric
As a rule, it is very difficult to eliminate the causes of stray voltages that are induced by a motor. Nevertheless, it is possible to avoid damage to the bearing, if the flow of current can either be prevented or at least significantly reduced. Many types of current insulated bearings are available today for this very purpose.