Turning fridge on and off

Not to turning fridge on and off confused with Turing. This article is about the machining operation. For the generic use of the word, see rotating.

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helix toolpath by moving more or less linearly while the workpiece rotates. Thus the phrase “turning and boring” categorizes the larger family of processes known as lathing. Turning can be done manually, in a traditional form of lathe, which frequently requires continuous supervision by the operator, or by using an automated lathe which does not. Today the most common type of such automation is computer numerical control, better known as CNC.

CNC is also commonly used with many other types of machining besides turning. 1, 2, or 3 axes of motion to produce precise diameters and depths. The turning processes are typically carried out on a lathe, considered to be the oldest of machine tools, and can be of different types such as straight turning, taper turning, profiling or external grooving. Those types of turning processes can produce various shapes of materials such as straight, conical, curved, or grooved workpieces. In general, turning uses simple single-point cutting tools.