Ball screw is dedicated to the turning of thread and setting, in the other surface is turning, light, not only its poles ball screw.
丝杠是专门用来车削各种螺纹而设置的，在进行工件的其他表面车削时，只用光杠，不用丝杠。
2
CNC turning trapezoidal thread to explore several ways.
探讨数控车削梯形螺纹的几种方法。
3
With cars, milling, boring, drilling four automation function, can be turning sphere, cylinder, cone, thread, tapping, end face, inner and outer ring groove, etc.