Introduction

Rigidity of headstock is increased by using large span headstock and more reasonable spindle bearing arrangement. Size of main ways is increased. Strength, dynamic and static rigidity of machine is improved. Mechanical structure of main assemblies is more reasonable. It is a high rigidity, high precision, accuracy maintained and functional CNC pipe threading lathe, efficient and user-friendly, with nice appearance and ideal function to prevent any leakage. This machine is controlled by FANUC control. It is designed specially for threading of casing and tubing in petroleum industry. Outside diameter of external threading ranges from Ф110 to Ф 340mm .Taper threads to be cut includes round form, buttress threads and other special forms.