CNC (computer numeric control) Machining is a subtractive manufacturing process in that it involves using cutting tools to remove material as needed to form the desired part.
As mentioned, CNC milling works by cutting through whole material to form an object. The milling machine has milling cutters that come in various shapes and sizes. The cutter involves cylindrical tools that cut through the solid plastic and metal blocks based on the instructions given.
Computer numerical control (CNC) turning is a completely automated subtractive machining process in which live tooling combines both lathe and mill capabilities to machine parts from metal or plastic bars in order to create a specific shape.