These lathes are semi-closed loop CNC machine tools suitable to turn various complicated shaft, sleeve and disk-like work-pieces, such as turning of internal and external cylindrical, conical and other circumgyration surface as well as various metric, inch, modular and diametric pitch threads. They can also be used for oil grooves and keyways broaching, end-facing, grooving and chamfering etc. Besides turning applications, high speed and high efficiency turning center .It can also be used to drill and mill for various complicated work-piece machining by its X/Z/C 3-axis combined motion. The unique construction developed using FEA techniques to provide maximum stiffness under the heaviest cutting conditions. The machining accuracy is about IT5~IT6, and the surface roughness is about Ra0.4um for nonferrous metal cutting and Ra0.8um for ferrous metal’s. As universal CNC lathes, they are especially suitable for the machining of high precision work-pieces, and also widely used to machining parts in batches in the fields of automobile,   motorcycle, railroad, aero-craft, home-appliance, bearing, hardware, etc. So they are highly reputed in machine building industry.