Electrically insulated bearings refer to bearings that can prevent the passage of electric current and have insulating properties. Its insulation performance usually uses internationally advanced technology to process a layer of aluminum oxide coating on the outer ring or inner ring of the bearing to withstand voltage DC. Generally divided into inner ring-coated insulated bearings and outer ring-coated insulated bearings. Its basic coating can withstand voltages up to 1000 volts DC.

JRZC Bearing will introduce to you in detail:

The most common international suffix codes for insulated bearings are: VL0241, VL2071, VA3091, J20A, J20AA, J20B, J20C, SQ77, SQ77E, etc.

Suffix code with domestic nine-star electrically insulated bearings: V3031A, V3031B

Among them, VL0241, J20AA, J20A, J20B, SQ77 and V3031A all represent outer ring insulated bearings.

VL0241 is the code name of SKF outer ring insulated bearings.

J20AA, J20A, J20B are the codes of FAG outer ring insulated bearings. 

Insulated bearings are widely used: due to their unique technology and characteristics:

Electric power industry: cylindrical roller insulated bearings for generators; wind turbines, hydraulic generators, thermal generators.

Railway industry: cylindrical roller insulated bearings for diesel locomotive traction motors, used in locomotives, etc.

Machinery and metallurgical industry: Insulated bearings for high-power variable frequency motors: used in cranes, textile machines, printing machines, ironmaking equipment, steelmaking equipment, steel rolling equipment, cutting equipment, coking equipment, complete sets of smelting equipment, etc.

Mining machinery industry: Insulated bearings for high-power high-voltage motors, used in mining machines, coal preparation machines, coal washers, crushers, ball mills, grinders, and sand mills.

Petrochemical industry: Insulated bearings for high-power and high-voltage motors: used in compressors, etc.