What is the function of bearings

In terms of its function, it should be support, which is literally used to support the shaft, but this is only part of its function. The essence of support is to be able to bear radial loads. It can also be understood that it is used to fix the shaft. Bearing quick and easy automatic selection is included. It is to fix the shaft so that it can only rotate, and control its axial and radial movement. A motor wouldn't work at all without bearings. Because the shaft may move in any direction, and the motor requires the shaft to only rotate when working. Theoretically speaking, it is impossible to realize the transmission function. Not only that, the bearings will also affect the transmission. In order to reduce this impact, good lubrication must be achieved on the bearings of high-speed shafts. Some bearings themselves are already lubricated, which are called pre-lubricated bearings. Most bearings must be lubricated. When running at high speed, friction will not only increase energy consumption, but what is more terrible is that the bearings can easily be damaged. The idea of converting sliding friction into rolling friction is one-sided, because there is something called a sliding bearing.