Copper standard steel cage, aluminum alloy standard steel ball cage, ball-type copper special secret to keep aircraft, POM (plastic) Micronesia special steel cage-type, close-type aluminum alloy special steel cage, (copper, aluminum, POM) spiral steel cage. 

Ball Retainer /Ball Roller
1. Material: FZH /FZL /FZP
2. Applications: mainly used for rolling die mold and high-precision machine tools, the field of machine tool accessories.
3. Characteristics: with low coefficient of friction, axial and radial movement.