Collecting the manufacturing experience of many years, absorbing the advanced technologies of foreign same products, our company developed the CNC lathes of turning pipes threads series. Which are special-purpose CNC machine tools series for machining all kinds of pipes and pipe threads in petroleum drilling and metallurgical industry, With features of big diameter, high efficiency and high rigidity etc. The machining accuracy can be up to IT 7, and surface finish can be up to Ra 1.6μm.