... POM Danly, Hasco, MISUMI, PUNCH, DIN Without MOQ Ball retainer(Ball cages, ball bearing cages)Material: Brass,Aluminum, POMDanly, Hasco, MISUMI ... , PUNCH, DINWithout MOQ Ball Retainer Bearing with the rolling ball principle, with a copper base, aluminum or ... low coefficient of friction, axial, radial able to exercise the characteristics depend on the rolling friction, achieve seamless ...