What is the Life of Bearing?

Depending on the different performance requirements of the host machine itself, the life of a bearing can generally be divided into two categories: performance life and fatigue life. Bearing life can be thought of as the time a set of bearings reaches before it fails.

The performance life of a bearing refers to the time that the bearing can maintain the technical specifications required for the use of the mainframe. For example, bearings used in precision instruments do not exceed the specified dimensional accuracy, rotational accuracy, vibration index or do not exceed the specified friction torque and other indicators of time.

Bearing fatigue life refers to the rolling surface of the bearing parts in repeated cycles of stress to produce metal fatigue spalling time.

GB/T6391 "rolling bearing rated dynamic load and rated life" given in the definition of life as follows: a single rolling bearing life refers to a bearing of a collar (or gasket) or rolling body material before the first signs of fatigue expansion, bearing a collar (or gasket) relative to another collar (or gasket) rotation of the number of revolutions.

Bearing loss of normal performance and certain failure characteristics before the total number of revolutions or hours. Such as noise life (noise, vibration increase), wear life (due to wear caused by radial clearance increase), grease life (grease aging), rolling fatigue life (rolling surface fatigue spalling), etc.

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