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Electrically insulated bearings is a general term for bearings that can prevent current from passing and the bearing itself has insulation properties. Its insulation performance usually adopts international advanced technology to process a layer of alumina coating on the outer or inner ring of the bearing to withstand voltage and direct current. Generally divided into inner ring coated insulated bearings, outer ring coated insulated bearings. Its basic coating can withstand voltages up to 1000 volts DC.
The most common international suffix codes for insulated bearings are: VL0241, VL2071, VA3091, J20A, J20AA, J20B,J20C, SQ77, SQ77E, etc.
Among them, VL0241, J20AA, J20A, J20B, SQ77 are all outer ring insulated bearings
VL0241 is the code for SKF outer ring insulated bearings
J20AA, J20A, J20B are the codes of FAG outer ring insulated bearings
SQ77 is the code for NKE outer ring insulated bearings
VL2071, J20C, SQ77E, V3031B are all inner ring insulated bearings
VL2071 is the code of SKF inner ring insulated bearing
J20C is the code of FAG inner ring insulated bearing
SQ77E is the code of NKE inner ring insulated bearing