1. Low noise and vibration, noise and vibration level meet Z3 / Z4, V3 / V4. 2. Motor bearing for electric motor is made from bearing steel (GCr15). It features precision rotating, complying with ABEC-3 (P6), low friction torque and high running speed, can also work in either high or low temperature environment. 3. All types of bearing on this site are only for standard use. 4. Design for motor, and also can be used in other fields.