This 20mm linear rotary stroke bushings has a limited rectilinear traveling stroke, it works with minimal wear resistance and enables smooth linear/rotary complex motion. It can be used with a variety of devices. The stroke bushing is designed to allow the ball bearings to rotate smoothly. The outer case contains a retainer which forms a staggered arrangement of the steel balls in machined holes on its inner surface. Each ball in the retainer may rotate smoothly in its individual hole while the outer case moves in a rotary and/or rectilinear reciprocating motion, the most common application is the sheet metal forming or piercing dies, usually 4 of them are used with four linear motion hardened shafts, buy it online at http://www.vxb.com/page/
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