The high speed cnc machine can be used to turn the inner and outer surfaces of screw, arc, cone, end face and rotary body for large shaft parts and disk parts. The heavily ribbed one-piece casting allows for high loading capacity, extreme rigidity, and vibration buffering. All main components, bed, headstock, plinth, saddle and so on, are high quality solid castings. CKA series with automatic headstock gear changing, high spindle speed with wide range.