The thin-section radial contact ball bearing primarily designed for deep groove ball bearing to sustain heavy pressure. The basic design intention is not only to support radical load , but also can sustain middle axial load, rotary load and moment load. Thin-section four-point contact bearing is the ideal choice for supporting moment heavy pressure. It successfully satisfies the four points contact between raceway and steel ball in order to support moment load and reversing axial load. Although it can be applied in light load.