The factors that affect the life of INA universal joint bearings usually have the following aspects:

1. Feel the quality of the bearing through the surface
In the process of selling INA bearings, I found that many customers said that as long as the surface of the universal joint bearing is bright, the quality is good. This is wrong. The brightness of the bearing surface should be a black color. The reason for this black color is whether the steel used in the bearing meets the standard, its grinding process and the cutting fluid used, among which the first two are the main ones.

2. Whether the chamfer is bright
The chamfer of the bearing does not determine the quality of the bearing, but it reflects the processing method of the universal joint bearing. The chamfer is black, which means that the hardness of the bearing is increased by heat treatment such as quenching. Some people think that the black chamfer is not good because it is not processed completely. This is a misunderstanding.

3. The one-piece cage is better than the two-body. Although the new technology uses one-piece cage, it only saves materials, and the performance against rotation is worse than that of the two-body.

In general, the service life of universal joint bearings is related to three factors. One is the quality of INA bearings. The second is the use environment. The third is the installation method.