Crossed roller bearings are precision parts, so be careful when using them. Even if a high-performance bearing is used, if it is used improperly, the expected performance effect cannot be achieved, and the bearing is likely to be damaged. However, under certain special operating conditions, the bearing life can be longer than traditional calculations, especially under light load conditions. These special operating conditions are when the rolling surface is effectively separated by the lubricating oil film and contaminants may be possible. Surface damage caused. In fact, under ideal conditions, the so-called permanent bearing life is possible.
The service life of a bearing is defined by the number of revolutions, and the bearing within this life should have preliminary fatigue damage on any of its bearing races or rolling elements. However, whether in laboratory tests or in actual use, it can be clearly seen that the actual life of crossed roller bearings with the same appearance under the same working conditions is quite different. In addition, there are several different definitions of bearing "life", one of which is the so-called "working life", which means that the actual life that a certain bearing can reach before damage is caused by wear and tear, and damage is usually not caused by fatigue, but Caused by wear, corrosion, seal damage, etc.
Therefore, one-third of bearing damage is caused by fatigue damage, another third is caused by poor lubrication, and the other third is caused by pollutants entering the bearing or improper installation and treatment.
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