Hiwin Ball Screw For Machine 1.Cold Rolled & Long life 2.Taiwan TBI ball screw 3.accurancy grade C5,C7 4. Lower Noise ... produces and exports all kinds of linear rolling transmission parts. our main products are cold rolling ball screws ,precision ball screws, linear ... guide, linear slide rail ,etc.Primordial threaded spindle of cold rolling ball screws are imported from Taiwan and Korea, etc.Accuracy ...