Generally, the service life of bearings is affected by the actual working conditions, including working conditions, environmental conditions and maintenance and maintenance conditions,
Take the main shaft bearing as an example. Under ideal conditions, if its working temperature is appropriate and the variation range is stable, there is no solid dust, harmful gas and water intrusion in the environment, and the lubrication condition is appropriate, the bearing may operate indefinitely.
However, in actual bearing use, its working load may be greater than the corresponding fatigue limit load. After a certain period of operation, the bearing will fail due to fatigue peeling due to the fatigue limit of its own material. Even if the working load of the bearing is lower than the limit load, the bearing will fail due to wear due to bearing pollution. In short, there are many adverse factors in the actual working conditions of the bearing, which will lead to the shortening of its service life;
To maintain the performance of the main shaft bearing, it is necessary to use the bearing correctly in a certain period of time; Broadly speaking, the service life of bearings refers to the time when they can no longer be used after being damaged under abnormal conditions such as noise, vibration, wear, precision reduction, grease aging, surface fatigue peeling, etc; In addition to the above, bearing failure caused by sintering, fracture, crack, ferrule jamming, seal damage, etc. of bearing due to wrong selection of bearing, poor design of relevant parts, wrong installation of bearing or wrong maintenance method will seriously affect the service life of bearing.