CNC turning is a machining technique controlled by computers and is also a part of mechanical machining. There are two main machining forms: one is to fix the turning tool and process the unformed workpiece during rotation; Another method is to fix the workpiece and perform precision machining by high-speed rotation of the workpiece and horizontal and vertical movement of the turning tool (tool holder).

CNC turning machines come in 2-axis and 3-axis types. Swiss precision automatic machine tools come in 3-axis, 5-axis, 6-axis, and 8-axis types