Under a certain load, the number of revolutions or hours the bearing experiences before pitting is called the bearing life.
The life of a rolling bearing is defined in revolutions (or hours of operation at a given speed) : a bearing within this life shall undergo initial fatigue damage (spalling or defect) on any bearing ring or rolling body. However, no matter in the laboratory test or in the actual use, it can be clearly 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 achieved before damage is caused by wear, damage is not usually caused by fatigue, but by wear, corrosion, seal damage and other reasons.
This article by the east tiger chassis accessories co., LTD. Arrangement