This series machines are designed and upgraded on the basis of CNC turret lathe model CK3263 that was granted the award of national gold medal, it has the characters of high power and high rigidity and can perform the machining of straight line, diagonal line, round arc, threading with metric and whitworth system, staright and taper threading, surface threading, threading with multi-nose, and it has functioon of tool compensation. Therefore it is very suitable for the machining to the parts of shaft, disc and quill with complex shape and high precision required.