FAG bearing life calculation is in accordance with ISO life calculation method, which introduces a correction factor mouth. , Cleanliness factor S and the coefficient K, in order to consider the load factors and lubricant film also introduces a static load factor f.

FAG bearing life is calculated as:

Lnm = A1A23L10
A23 = A23n.S
A2311 = f (k.K)

K is an essential factor for the calculation of FAG 4 Chun′s coefficient, FAG does not point K represents the physical meaning of the process from the calculation of K can be drawn that it considered the bearing type, bearing size, bearing static load equivalent exposure and lubricants viscosity.