The solution of load distribution of rolling element bearing is closely related to the calculation of some key performance indicators

such as load-carrying capacity

lubrication characteristics

fatigue life and so on.In view of dimension deviation of balls in manufacturing processing

a load distribution model of angular contact bearing in consideration of ball dimension deviation is put forward.Based on the load distribution model

the effects of dimension of off size

circumferential position

number and arrangement of ball dimension deviation on bearing load distribution and the effects of dimension deviation under different clearance are analyzed.Through calculation and analysis of 7218Bangular contact bearing

the follow conclusions are obtained.For single ball dimension deviation

it is found that the magnitude of ball contact loads fluctuation is linearly dependent on the value of dimension deviation

and has no correlation with bearing clearance.In addition

the variation of ball contact load is a function of circumferential position of dimension deviation.For multiple balls dimension deviation

both relative dimension deviation value and arrangement of balls dimension deviation have great effects on load distribution.