'Why does replacing the electric spindle bearings sometimes clear the noise, but sometimes it doesn't?' I used to talk to many people about these issues, and they sometimes even complained that the noise of the bearing is like a feng shui metaphysical problem. You don't know how it's fine, but sometimes it's hard to fix no matter what. Is this really the case? Motor noise problems are a very common phenomenon that confuses customers. Regardless of the manufacturer of the motor or the user of the motor, a method of 'replicating one thing and losing the other' is to change where it can't be. Therefore, in the way we use on site, the bearing is replaced when the bearing is noisy. The method of 'replacing the bearing when the bearing rings' is sometimes reasonable in the field, but in many cases, no matter how you change it, there should be some noise or some noise. A more detailed understanding of this kind of thing is: replacing the bearing will reduce the noise. It may be a problem with the bearing itself, but it may not be. If the bearing is replaced, the noise is still not reduced, and the high probability indicates that it is not necessarily caused by the bearing. First, if it is the problem of the motorized spindle bearing itself, then replace the bearing with no problem, and the noise will of course be reduced. The premise is that the replaced bearings do not have any quality problems. And the replacement method is appropriate. Second, if the processing method of the assembled bearing is not correct, each installation will cause damage to the bearing, so no matter how the bearing is replaced, the noise cannot be solved. In addition to the processing method, the assembly also needs to consider whether the processing technology is stable. For example, the same way to assemble the bearing by beating. If the knocking damages the bearing, the probability of noise in the bearing will be greatly increased; when the next bearing is installed, the knocking is lighter, and the bearing is almost not damaged, so of course the bearing noise after installation is small. If this noise difference is attributed to the motor spindle bearing itself, it is obvious that no direct cause has been found. After a long time, the looming bearing noise problem cannot be completely eliminated. Third, if there is any problem with the shape and shape tolerance of the bearing seat or the shaft member, the noise may be improved after replacing the electric spindle bearing, or it may not be easy to improve. First of all, if the bearing seat or shaft has a slight dimensional tolerance deviation, after the first bearing is assembled, the internal structure of the bearing is squeezed and the dimensional tolerance deviation is squeezed, which is likely to produce noise. If the slight deviation is adjusted, there is no possibility of abnormality in the mounted bearing. Secondly, in the case of serious dimensional tolerance deviation, even with the 'adjustment' of the previous bearing, it is still impossible to adjust the product workpiece back within the tolerance range. So no matter how you replace the bearing, the noise will still exist. It can be seen from the above examples that if there is any problem with the electric spindle bearing itself, it is reasonable to replace the bearing. If the problem is not the bearing at all, then replacing the bearing may or may not work. This confusing situation is very harmful. It is strongly required that when encountering the problem of bearing noise, it is necessary to refer to a certain concept to find the root cause of the disease, rather than simply replacing the bearing. Only by looking for the cause of the disease can we treat both the symptoms and the root causes. The torque is accurate, in order to turn stable!