Ball screw is a device that converts rotary motion into linear motion and is commonly used in industrial machinery. It consists of a ball thread and a ball recirculating track, and the conversion of rotational motion and linear motion is realized by rolling the balls between the ball thread and the ball recirculating track Product name Ball screw Model Number External circulation double nut Brand Name SHUNTAI Material GCr15 Bearing steel, Steel Manufacturing Process Rolled screw, ground screw Feature Long Operating Life Delivery 7 Days Shipping Port Shanghai