Deep Groove Ball Bearing:6000, 6200, 6300, 6700, 6800, 6900 serise. Deep groove ball bearings mainly take radial load as well as moderate axial load. With less coefficient of friction, less vibration and noise, less energy consumption, high limiting speed, large size range and variations of structure. Detailed Description Model: Open, Z, ZZ, RZ, 2RZ, RS, 2RS