Angular contact ball bearing is widely used in machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft, booster pump, drilling platform, dividing head, filling machine, oil pump, roots blower, air compressor, all kinds of transmission, fuel injection pump, printing machinery, planetary reducer, extraction equipment, cycloid reducer, food packaging machinery, electric welding machine, gravity type spray gun, etc.