Mandrel vs. Collet

Mandrelnoun

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.

Colletnoun

A band, flange, ferrule, or collar, designed to grip and hold a tool or a workpiece under proper control, and usually to release it under control thereafter; such a collet usually is made of a hard, springy material, especially a metal.

‘That collet can handle up to 3/8-inch bits.’;

Mandrelnoun

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.

Colletnoun

(jewelry) The rim (of a ring) within which a jewel is set.

‘There is an almost invisible collet that secures the stone to the ring.’;

Mandrelnoun

A bar of metal inserted in the work to shape it, or to hold it, as in a lathe, during the process of manufacture; an arbor.

Colletnoun

(horticulture) In an embryonic plant, the transition zone between the root and the hypocotyl (not clearly distinguishable in most plants.)

‘Collar rot forms in the collet between the stem and the root.’;

Mandrelnoun

any of various rotating shafts that serve as axes for larger rotating parts

Colletnoun

A small collar or neckband.

Mandrel

A mandrel, mandril, or arbor is: a gently tapered cylinder against which material can be forged or shaped (e.g., a ring mandrel used by jewelers to increase the diameter of a wedding ring); or a flanged or tapered or threaded bar that grips a workpiece to be machined in a lathe. A flanged mandrel is a parallel bar of a specific diameter with an integral flange towards one end, and threaded at the opposite end.

Colletnoun

A small metal ring; a small collar fastened on an arbor; as, the collet on the balance arbor of a watch; a small socket on a stem, for holding a drill.

Colletnoun

The part of a ring containing the bezel in which the stone is set.

‘How full the collet with his jewel is!’;

Colletnoun

a metal cap or band placed on a wooden pole to prevent splitting

Colletnoun

a cone-shaped chuck used for holding cylindrical pieces in a lathe

Colletnoun

a band or collar that holds an individual stone in a jewellery setting

Collet

A collet is a segmented sleeve, band or collar. One of the two radial surfaces of a collet is usually tapered (i.e a truncated cone) and the other is cylindrical.