ZWZ bearings-The self-aligning ball bearing is applicable for occasions with sizable shaft flexion or shaft disalignment , such as the transmission shaft of precision meter, quiet motor, car, motorcycle, woodworker and textile machinery. It can also be applied on mining machine, electromechanical device, plastics machinery, office device, medical appliance, body-building and sports goods, and common machine etc. It is one of the bearings most widely used in machinery industry.