. Antifriction BearingAntifriction Bearing operate with rolling elements (either balls or rollers), and hence rolling resistance, rather than slicing friction.predominates. The cause of rolling resistance is the deformation of mating surfaces (配合表面) of the rolling element and the raceway on which it rolls. The three basic types of antifriction bearings are ball bearings. roller bearings. needle bearings. Ball and roller bearings can be designed toAbsorb (absorb) thrust load in addition to radial load荷) , whereas needle bearings are limited to radial load applications only.One of the principal advantages of antifriction (rolling contact) bearings is the almost complete elimination of friction. Therefore. the main function of antifriction bearing lubricants is to help prevent corrosion and dirt contamination.