The function of the rolling mill bearing is to support the rotating roll, bear the rolling force generated from the roll, and ensure that the roll maintains a precise position in the stand. In the daily operation of rolling mill bearings, the phenomenon of early failure will occur, which may be affected by factors such as bearing material selection, precision design, and lubrication conditions.

The early failure modes of rolling mill bearings mainly include raceway spalling, wear, corrosion, etc. The service life and reliability of the rolling mill bearing are closely related to the design and installation of the bearing. If the bearing seat is not properly designed, the bearing force will be unbalanced and the service life of the bearing will be reduced. The service life of the bearing for rolling mill is very discrete. On the basis of the same load, the service life of the same type of bearing from the initial installation to the damage is very different. After continuous research and analysis, it is concluded that the factors affecting the service life of rolling mill bearings are as follows: The on-site installation accuracy and installation process of the bearing are unreasonable, and the assembly of the selected bearing seal is unreasonable. It is mainly divided into two aspects: internal factors and external factors. Internal factors include bearing material, structural design, processing and manufacturing, etc., and external factors include bearing rotational speed, load bearing, lubrication, cooling. According to relevant statistical data, the probability of abnormal failure of rolling mill bearings in our country is more than 70%.

In view of the abnormal failure of the bearing, it is necessary to analyze the two aspects of the host system and the bearing immediately to find the factors that cause the bearing failure, and then take reasonable measures to prolong the service life of the bearing.