Factors affecting the quality of bearings:

1. Along with advanced structural design, there will be a longer bearing life. Bearing manufacturing involves multiple processes including forging, heat treatment, turning, grinding, and assembly. The rationality, progressiveness and stability of the treatment will also affect the service life of the bearing. The heat treatment and grinding processes that affect bearings are often more directly related to product quality and bearing failures. In recent years, research on the deterioration of the surface layer of bearings has shown that the grinding process is closely related to the surface quality of the bearings.

2. The metallurgical quality of bearing materials is the main factor affecting the early failure of rolling bearings. With the advancement of metallurgical technology (such as bearing steel, vacuum degassing, etc.), the quality of raw materials has been improved. The proportion of raw material quality factors in bearing failure analysis has significantly decreased, but it is still one of the main factors causing bearing failure. Whether the selection is appropriate or not is still a necessary consideration for bearing fault analysis.

3. After the installation of the bearing is completed, in order to check whether the installation is correct, a running inspection should be carried out. Small machinery can be rotated by hand to confirm smooth rotation. The inspection items include poor operation caused by foreign objects, scratches, and indentations, unstable torque due to poor installation and processing of the mounting seat, excessive torque caused by small clearance, installation errors, and sealing friction, etc. If there are no abnormalities, it can be moved to start the force operation.

If the bearing malfunctions severely for some reason and heats up, the bearing should be removed to investigate the cause of the heating; If the bearing heats up with noise, it may be due to the bearing cover rubbing against the shaft or the lubricating grease drying up. In addition, the outer ring of the bearing can be shaken by hand to rotate it. If there is no looseness and the rotation is smooth, then the bearing is good; If there is looseness or jamming during rotation, it indicates that there is a defect in the bearing. At this time, further analysis and investigation of the cause should be conducted to determine whether the bearing can continue to be used.