Assembling radial thrust ball bearing

The utility model provides a novel combined centripetal thrust ball bearing, an inner cover (5) is provided with a plurality of group steel balls (7) and a plurality of arrange outer covers (6) to form a centripetal thrust ball bearing. The utility model design is special, the structure is simple. The inner cover of the plurality of arrange thrust bearings is designed to an integrate structure, the inner cover is provided with a plurality of group steel balls and a plurality of arrange outer covers, in this way, on the basis of no influence on the existing screw boring tool working performance, the eccentricity rotating does not happen in the process of rotating, so the enduring force of the bearing is uniform, the service life of the bearing is greatly increased. As the inner cover and the axis are the interference matching structure, the inner cover does not produce abrasion to the axis in the process of rotating, so the service life of the axis is increased, and the using costs are reduced, so the utility model avoids the abuse of the existing plurality arrange thrust ball bearing influencing the production due to frequent replacing the bearing and the axis.