上海充通大学 Shanghai Jiao Tong University Lead Screw and Ball Screw Lead screw(传导螺轩 Lead screws are essentially accurate screws used to move a nut attached to a load,and they have been used for centuries to convert rotary motion into linear motion -Lead screws are commonly used on manual economy machine tools -Efficiency in a lead screw system may be 30-50%5 Lead Screw and Ball Screw Lead screw(传导螺杆) • Lead screws are essentially accurate screws used to move a nut attached to a load, and they have been used for centuries to convert rotary motion into linear motion – Lead screws are commonly used on manual economy machine tools – Efficiency in a lead screw system may be 30-50%