1a : a usually tapered or cylindrical axle, spindle, or arbor inserted into a hole in a piece of work to support it during machining. b : a metal bar that serves as a core around which material (such as metal) may be cast, molded, forged, bent, or otherwise shaped.

Why is mandrel used?

Mandrel, cylinder, usually steel, used to support a partly machined workpiece while it is being finished, or as a core around which parts may be bent or other material forged or molded.

What is mandrel and its types?

Typically, these mandrels consist of a cylinder that is threaded on one end. There are many different types of mandrels for specialized applications. Examples include live chuck mandrels, live bull ring mandrels, and dead bull ring mandrels.