Definition of "mandrel" in English

noun

1. A round object used as an aid for shaping a material, e.g. shaping or enlarging a ring, or bending or enlarging a pipe without creasing or kinking it.

2. A tool or component of a tool that guides, grips or clamps something, such as a workpiece to be machined, a machining tool or a part while it is moved.

verb

1. (transitive) To shape with a mandrel.