ball screw Model: SFU/DFU/SFE/DFT/DFT. Dia.: 12mm-80mm. Lead: ,5mm, 10mm ,20mm etc. Ball screw is consisted of screw, nut and balls. It is to transfer the rotary motion into linear motion or transfer the linear motion into rotary motion. Ball screw is widely used for all kinds of industrial equipments and precision instruments. Especially in recent years, it is widely used in CNC machine tools. ...