Ball Retainer Bearing with the rolling ball principle, with a copper base, aluminum or resin to maintain the planes, according to a certain angle and density arranged in an orderly manner. Using the latest trench technology circumferential bead lock to prevent the ball falling. Products with a low coefficient of friction, axial, radial able to exercise the characteristics depend on the rolling friction, achieve seamless assembly, guaranteed accuracy. The product is a traditional column sets of replacement products, to high-speed sports, mainly for rolling Die moldbase and high-precision machine tools, machine tool attachment and other fields.