The effect of bearing raceway lubrication status and contact force on the service life of bearing is significant. In order to improve the service life of cylindrical roller bearing, one method is proposed that bearing outer is slotted and filled with elastomer. The effects of different pore size and four fillering materials with nitrile rubber, nylon-1010, hard aluminum alloys and red copper on the contact force between the inner ring raceway and rollers of bearing have been calculated with finite element method (FEM). A mixed lubrication model is established by considering the real surface roughness of cylindrical roller bearing, and the influence of different fillering materials on lubrication performance of bearing under different rotation speeds conditions has been obtained as well. The results show that the effect of bearing outer filled with elastomer on lubrication performance and contact force is significant. The contact force of the maximum force roller and inner ring raceway decreases with the decreasing of the elastic modulus of filler materials. And it is found that nitrile rubber and nylon-1010 can obviously increase the contacts number and effectively reduce the contact force. The increase in speed increased film thickness but reduced coefficient of friction, contact load ratio, contact area ratio and max. von mises stress. And the lubrication performance of nitrile rubber fillering materials bearing is best.
