CNC Screw Machine CNC screw machining is a screw machine that is controlled by a computer. Screw machining is a process that uses the principle of turning the part (lathe) and advance cutting and forming tools of all sorts (drills, form tools, milling cutters, taps, dies, etc.) to shape the part. Automated design and CNC interfaces provide the most accurate and cost-effective channel from customer specification to production process with little or no lost time. Used CNC Screw Machines are classified as A8175. Used CNC Screw Machines in stock: Traub Used Automatic Screw Machines in stock. Used tooling for Citizen Swiss Type Automatic Screw Machines in stock. See our Used CNC Screw Machines For Sale Back