by 
Failure frequency of outer ring of rolling bearing: bpvor ≌ 0.4nn
Failure frequency of inner ring of rolling bearing: bpfir ≌ 0.6nn
Failure frequency of rolling bearing cage: ftfr ≌ 0.4N
Above symbols:
N = number of scrolls.
N = shaft speed. {TodayHot}
Note: 1 The rolling bearing does not slide; 2. The geometric dimension of rolling bearing has not changed; 3. The bearing outer ring is fixed without rotation
Even if the invisible smile dust enters the bearing, it will increase the wear, vibration and noise of the bearing.
It is not allowed to punch with force, directly knock the bearing with a hammer, and transfer pressure through the rolling element. It is hoped that the INA Bearing package will be opened during installation. During general grease lubrication, the bearing is not cleaned but directly filled with grease.
In case of oil lubrication, it is generally not necessary to clean. However, bearings for instrument or high-speed use shall be cleaned with clean oil to remove the antirust agent coated on the bearings. Bearings with rust inhibitor removed are easy to rust, so they cannot be placed at will.
Failure frequency of inner ring of rolling bearing: bpfie ≌ n (0.5N + 1.2)
Failure frequency of rolling element of rolling bearing: BSFE ≌ n (0.2n-1.2 / N)
Failure frequency of rolling bearing cage: FTFE ≌ n (0.5-1.2 / N)
Above symbols:
N = number of scrolls.
N = shaft speed.
Note: 1 The rolling bearing does not slide; 2. The geometric dimension of rolling bearing has not changed; 3. Fault Frequency The bearing outer ring is fixed without rotation
However, under some special operating conditions, the thrust ball Fault Frequency bearing can obtain a longer life than the traditional calculation, especially under light load.
These special operating conditions are the surface damage that may be caused when the rolling surface (track and rolling parts) is effectively separated and limited by a lubricating oil film. In fact, under ideal conditions, the so-called permanent bearing life is possible.
The service life of ina bearing is in revolutions (or hours of operation at a certain speed). Definition: the bearing within this service life shall have preliminary fatigue damage (peeling or defect) on any bearing ring or rolling element.
However, no matter in laboratory test or in actual use, it can be clearly seen that the actual life of thrust ball bearing with the same appearance under the same working conditions 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 before damage is caused by wear and damage, which is usually Fault Frequency not caused by fatigue, but by wear, corrosion, seal damage and other factors.