Insulated bearings improve reliability of electrical machines

Nine Star Bearing China offers Current insulated rolling bearings with diameters from 50 mm to 500mm. Special sizes can be OEM as request. The electrically insulated rolling bearings are available in most types. Especially insulated deep groove ball bearing and Insulated cylindrical roller bearings, which are commonly used
in electric motors, railway trains and wind generators.

Bearings with an oxide ceramic insulating layer have a guaranteed minimum breakdown voltage of 1000 V
DC. The insulation coating is applied to the outer rings or inner rings by plasma spraying method.

The load ratings, boundary dimensions and tolerances of Nine Star electrically insulated bearings are identical to those of standard bearings, and therefore completely interchangeable with conventional bearings. Electrically insulated bearings provide optimal protection against bearing damage caused by electro corrosion, and therefore enable significantly improved reliability of electrical machines compared to conventional bearings.