1.Low noise 2.High-quality steel 3.Low price 4.A large inventory. 1. Is a separable type bearings, contact angle 90 °, can be installed separately, can only carry axial load.2. Low speed limit. Ji Xiang roller ball outside of the centrifugal force increases, easy bruising, but not suitable for high-speed operation.3.The ball side seat thrust ball bearings with aligning performance, eliminate ...