Why is the bearing damaged?

Bearings are precision parts and only some of the bearings are damaged in practical applications.

Most of the bearings are damaged for many reasons - beyond the original estimated load, non-effective seals, too tight bearing clearance caused by too small bearing clearance. Any of these factors have their particular type of damage and leave a special mark of damage. Therefore, inspecting the bearing of the damaged shaft, in many cases, the possible causes can be found. In general, one-third of the bearing damage is caused by fatigue damage, and the other third is caused by poor lubrication. The other third is due to contaminants entering the bearing or improperly installed.

However, these types of damage are also related to industry. For example, most of the pulp and paper industry is due to poor lubrication or contamination resulting in bearing damage rather than material fatigue. Bearings are precision parts and therefore require a very careful attitude when used. Even if high-performance bearings are used, if they are used improperly, the expected performance effects will not be achieved and the bearings will be damaged easily. Therefore, the following matters should be noted when using bearings:

 1. Keep the bearings and their surroundings clean. Even if tiny dust that is invisible to the naked eye enters the bearings, it will increase the wear, vibration and noise of the bearings.

Second, use the installation carefully and carefully Do not allow strong stamping, do not allow the hammer to directly hit the bearing, does not allow the pressure to pass through the rolling element.


Third, the use of appropriate and accurate installation tools Try to use special tools, try to avoid the use of cloth and short fibers and the like. Fourth, to prevent the corrosion of the bearing When taking the bearing directly by hand, it is necessary to fully wash the sweat on the hand, and apply high-quality mineral oil before operation, especially in the rainy season and summer to pay attention to rust.

However, under certain special operating conditions, bearings can achieve longer life than traditional calculations, especially at light loads. These special operating conditions are when the rolling surfaces (tracks and rolling elements) are effectively separated by a lubricating film and the surface damage caused by contaminants is limited. In fact, under ideal conditions, so-called permanent bearing life is possible. Bearing life

The life of a rolling bearing is defined by the number of revolutions (or hours of operation at a certain speed): Bearings within this life are subject to initial fatigue damage (flaking or missing) on any of their bearing rings or rolling elements. However, whether in laboratory tests or in actual use, it can be clearly seen that under the same working conditions, the appearance of the same bearing, the actual life is very different. In addition, there are several different definitions of the bearing "life", one of which is the so-called "working life", which means that the actual life that a bearing can reach before it is damaged is caused by wear and damage, usually not caused by fatigue, but Caused by wear, corrosion, seal damage, etc.