TRUNNION

Trunnion

A trunnion is a cylindrical protrusion used as a mounting and/or pivoting point. In a cannon, the trunnions are two projections cast just forward of the center of mass of the cannon and fixed to a two-wheeled movable gun carriage. As they allowed the muzzle to be raised and lowered easily, the integral casting of trunnions is seen by military historians as one of the most important advances in early field artillery.

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trunnion

Noun

  1. One of the short stubby bearings on either side of a cannon; a gudgeon.
  2. A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool.


The above text is a snippet from Wiktionary: trunnion
and as such is available under the Creative Commons Attribution/Share-Alike License.

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