wrench, also called spanner, tool, usually operated by hand, for tightening bolts and nuts.

Die stocks (also known as die holders) are tubular parts that are used for fitting and turning dies when cutting or shaping materials. Die stocks are often used for cutting…

A camshaft is a shaft that contains a row of pointed cams, in order to convert rotational motion to reciprocating motion. Camshafts are used in piston engines, mechanically controlled ignition…

In mechanical engineering, a shaft is a rotating machine element, usually circular in cross section, which is used to transmit power from one part to another, or from a machine…