Electrically Insulated Bearings

Hardness and Wear Resistance

Coated Insulated Bearings: The base rings are made of high-carbon chromium bearing steel (SUJ2), with a hardness of 60~64 HRC. The insulating coating has a hardness of approximately 1000~1500 HV, resisting minor impacts and wear while protecting the insulation layer from damage.

Ceramic Rolling Element Insulated Bearings: The ceramic rolling elements have a Vickers hardness of 1500~1800 HV, with wear resistance 5~10 times that of steel rolling elements. The coefficient of friction is as low as 0.001~0.003, allowing for stable operation even without lubrication.

All-Ceramic Insulated Bearings: While possessing high overall hardness, they are more brittle and have weaker impact resistance than metal bearings.

Load Capacity

Radial Rated Dynamic Load: The dynamic load capacity of coated insulated bearings is consistent with that of ordinary carbon steel bearings of the same specification, reaching 95%~100% of that of SUJ2 bearings of the same size; the dynamic load capacity of ceramic rolling element insulated bearings is 85%~95% of that of carbon steel bearings of the same specification, meeting the medium-to-high load requirements of motor spindles, etc.

Radial Rated Static Load: The static load capacity of coated insulated bearings is on par with that of carbon steel bearings; ceramic rolling element bearings have high compressive strength, are not prone to permanent deformation under short-term overload, and have better static load performance than steel bearings.