Abstract: The quasi-dynamic method based on the Hertz contact theory is usually used in the research on load distribution in ball bearings, but this method has a big discrepancy with the actual condition due to the semi-infinite boundary condition of the Hertz contact theory and the rigid ferrule hypothesis used. With the development of the finite element method and boundary element method, it is possible to research on the load distribution in ball bearings considering the ferrule deformation and boundary condition. The finite element method is used to research the load distribution in ball bearings in this paper. The regulars of the load distribution in different load cases are obtained by calculation. The results are compared with those obtained by the quasi-dynamic method and the experiment. It is found that the results of finite element method are close to the experiment values because the ferrule deformation and boundary condition are considered.

Key words: ball bearing, load distribution, finite element method, contact stress, contact angle