How long is the service life of the bearing

Time：

Aug 29,2022

Under a certain load, the number of revolutions or hours experienced by bearings before pitting is called bearing life.

The life of a rolling bearing is defined in revolutions (or hours worked at a certain speed) : a bearing within this life shall suffer initial fatigue damage (spalling or defect) on any of its bearing rings or rolling parts. However, whether in laboratory tests or in actual use, it can be obviously seen that the appearance of the same bearing under the same working conditions, the actual life is very 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 of a bearing can be reached before damage is caused by wear, damage is usually not caused by fatigue, but by wear, corrosion, seal damage and other reasons.

In order to determine the standard of bearing life, the bearing life is associated with reliability.

Because of the difference in manufacturing accuracy and material uniformity, even if the same material and the same size of the same batch of bearings are used under the same working conditions, their life lengths are not the same. If the statistical life is 1 unit, the longest relative life is 4 units, the shortest is 0.1-0.2 units, and the ratio between the longest and the shortest life is 20-40 times. 90% of bearings do not produce pitting, the number of revolutions or hours experienced is called the rated life of the bearing

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