The lathe is a machine tool that mainly uses the turning tool to turn the rotating workpiece. Lathe is the most important cutting machine tool in metal cutting machine tools, in the general machine manufacturing factory to the largest number of lathes, also known as the working machine. In the lathe can also be used drill, reaming drill, reamer, tap, die and knurled tools for the corresponding processing. The function of the lathe is to cut various rotating surfaces of different sizes and shapes, as well as spiral surfaces.