High precision heavy-duty ball screw Brief Description to ball screw 1. Our ball screw assembly has the advantages of high efficiency, low energy consumption, long service life, large loading capacity, high precision, small starting torque, easy maintenance, high sensitivity, easy lubricating, etc. the series include outer circulation and inner circulation. Shaft material is SCM 450m nut is SCM 415, ball is SUJ2. Precision ranges from C0-C10. 2. Our super-long high precision heavy-duty ball screw