If the paired bearing of the machine tool fails in the early stage, it may be that your preload force is not correct; when installing the paired angular contact bearing, a certain preload force is usually applied, which can effectively resist the beating of the main shaft, improve the rotation accuracy of the main shaft, and reduce the bearing tension. Vibration and noise; however, the size of the preload force is also very particular, if the preload force is too small, it will lead to poor accuracy, large spindle runout, easy to cause early failure, if the preload force is too large, it will make the bearing The friction force is too large during operation, it is easy to heat up, and it may directly lock up in severe cases; Take the two-pair pairing as an example, the inner ring should be pressed when back-to-back pairing is performed, and the outer ring should be pressed when facing face-to-face pairing. If the bearing protrusion is too large, if it is not pressed tightly, the bearing will not be stressed, which will cause the bearing to fail early. 37 years of machine tool matching bearings, our company is located in the Yangtze River Delta region, has developed transportation and logistics, has special logistics lines for different customers, the company has sufficient inventory, and the spot is purchased on the same day. The torque is accurate, in order to turn stable!