It is generally required to be flexible in transmission and allow a certain amount of backlash, but the backlash is generally not too large and kept at a few wires. Single nut is used for most selections. Single nut is relatively cheap in price and more flexible in transmission. In the case of precision transmission that does not require a backlash, you need to choose a double nut pre-tightening. The double nut can adjust the pre-tightening force, maintain the strength, and repeat the adjustment. In addition, it should be noted that when the stroke space is limited, the offset preload can be selected. This method has a relatively small preload and is not convenient for repeated adjustments. It is generally not selected in the selection process.
The main function of the ball screw is to convert the rotary motion into linear motion. It has the advantages of high precision and high efficiency. The ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert the rotary motion. Into linear motion, or convert torque into axial repetitive force, at the same time it has the characteristics of high precision, reversibility and high efficiency. Because of its small frictional resistance, ball screws are widely used in various industrial equipment and precision instruments.