When the ball screw is running, the temperature rise will affect the accuracy of the mechanical transmission system, especially the high-speed and high-precision machinery. The factors that affect the temperature rise of the lead screw are basically: 1. Preload; 2. Lubrication; 3. Pretension.
In order to avoid any loss of step of the mechanical transmission system, it is important to increase the rigidity of the nut. However, to increase the rigidity of the nut, the pre-pressure of the nut must reach a certain level. Applying pre-pressure to the nut will increase the friction torque of the thread and increase the temperature rise during work. It is recommended that the medium and heavy preload is 8% of the dynamic load, the medium preload is 6%-8%, the medium and light preload is 4%-6%, the light preload is below 4%, and the preload should not exceed 10%. The dynamic load to obtain the best life and lower temperature rise effect.
