Bearings, as an important part of contemporary machinery and equipment, play a very important role in our lives. However, the maintenance of bearings is a very troublesome thing, so there are maintenance-free bearings .
This kind of bearing requires little maintenance or very little maintenance. Maintenance-free is generally for self-lubricating bearings, no additional oil is required, and maintenance is not required during the service cycle. In terms of bearing, its function should be support, that is, it is used to support the shaft literally, 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 as it is used to fix the shaft. The automatic selection of bearings is included. It is to fix the shaft so that it can only achieve rotation while controlling its axial and radial movement. The motor cannot work at all without bearings. Because the shaft may move in any direction, and the motor is required to only rotate when it is working.
There are many types of bearings, and the universal joint cross is one of them. xsjbearing.com