Metal turning, spin forming, or spinning, is a process for working metal in which a tube or disc of metal is rotated at high speed and formed into a part that is axially symmetric. Spinning can both be performed by a CNC lathe or by hand.
Unlike conventional wood or metal turning, metal spinning involves the moulding or forming of sheet material over an existing shape, instead of the removal of material.
Metal spinning is one of the most advantageous ways to form round metal parts. Artisans too employ this method in the production of decorative household goods, urns, specialty lighting, as well as architectural design; while commercially, the process is used to make applications like public waste receptacles, brass instrument bells, gas cylinders, cookware, and rocket nose cones. From stainless steel and aluminum to high strength and high temperature alloys, virtually, any ductile metal can be formed using this method.