Bearing life

Source: China Bearing Network Time: 2013-02-27

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When the bearing is under load rotation; the ferrule raceway surface and the rolling body tumbling surface are constantly subjected to alternating load effects; even if the operating conditions are normal; the raceway surface and the tumbling surface may exhibit fish scale damage due to data fatigue ( Said to be stripped or peeled off).
The total number of revolutions before this tumbling fatigue damage is called the "(tired) life" of the bearing.
Even the same bearing, layout, data, processing methods, etc.; when rotating under the same conditions; bearing (tired) life still shows a large difference.
This is because the data exhaustion itself is discrete; it should be considered from the point of view of the calculation.
Therefore, a group of identical bearings are rotated under the same conditions; the total number of revolutions in which 90% of the bearings do not exhibit rolling fatigue is called "the fundamental extra life of the bearing" (ie, the reliability is 90% of the life) ).
When rotating at a fixed speed; can also be indicated by the total rotation time.
However, in actual work; it will also show the appearance of damage other than rolling fatigue.
These damages can be prevented by the selection, installation and smoothness of the bearings.

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