CK5231 CNC double column vertical lathe can automatically machine various workpieces made of iron metal and its alloy, non-ferrous metal and non-metal materials. Spherical surface, cylinder surface, cone, thread, end surfaces, inner and external groove can be cut on this machine. The machine can carry out cutting with surface constant velocity. The machine is suitable for large components machining in the industries of heavy duty machinery, power generation, shipbuilding, metallurgy, etc.