... heavy load machines and parts.6800 seriesOPEN, ZZ, RS, 2RSThe 6800 series bearings are widely used in Motors, car engines, power tools, ... 2RSThe 6900 series bearings are widely used in Motors, car engines, power tools, air-conditioner motors, vacuum cleaner motors, oil ... widely used in applications involving high rotational speed, and where low vibration and low noise are required.Standard Size Range- ...