... , 7000A, 7000B, dB, DF, QJ, QJF. 5.application: (1) Single row angular contact ball bearing is mainly used in the machine tool spindle, high frequency ... turbine, centrifuge, cars wheel, differential pinions axis; (2) Double row angular contact ball bearing widely used in oil pump, roots blower, air compressor, air ... .71.253310305631050×110×44.41.96 WQK Double Row Angular Contact Ball Bearing 3303ATN9