The following faults may occur during the use of bearings:

1. Wear: During the long-term use of the bearing, due to friction and wear, the metal materials on the bearing surface may be gradually worn. Wear will lead to the increase of bearing clearance, which will make the bearing lose its original precise fit and then affect its normal work.

2. Fatigue: The bearing may crack or break due to metal fatigue under high-speed rotation or long-term load. Fatigue fracture will cause the bearing to lose its bearing capacity, which may lead to serious mechanical failure.

3. Overheating: During the operation of the bearing, the bearing may be overheated due to poor lubrication, overload or internal failure of the bearing. Overheating will make the grease inside the bearing fail, increase friction and wear, and further aggravate the failure of the bearing.

4. Corrosion: Bearing may be affected by corrosion when used in wet or corrosive environment. Corrosion will damage the metal materials on the bearing surface and reduce the bearing capacity and life.

5. Pollution: If external pollutants, such as dust, particulate matter or impurities in grease, enter the bearing during use, it may lead to increased friction and increased wear of the bearing, and even lead to failures such as seizure or fracture.

In order to avoid bearing failure, regular inspection and maintenance are necessary. This includes changing the grease regularly to ensure that the bearings are in good lubrication condition, regularly checking the wear of the bearings, replacing the badly worn bearings in time, and maintaining the normal clearance and cooperation of the bearings. In addition, avoiding overload, overspeed and corrosive environment, using high-quality bearings and correct installation methods are also helpful to prolong the service life of bearings.