trunnion
noun/ˈtɹʌn.jən/
Etymology From French trognon (“core, stump”).
1
Engineering, Firearms, Government, Military, Natural sciences, Physical sciences, Politics, Tools, War, Weaponry One of the short stubby bearings on either side of a cannon; a pintle.
2
Engineering, Natural sciences, Physical sciences 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.
3
Engineering, Natural sciences, Physical sciences A shaft, held by a bearing, at each end or side of a rotatable object.
- To discharge, the conveyor is rotated laterally on its trunnions and the metal flows into a ladle carried on a travelling crane, which conveys it to the converter.1964 December, “Beyond the Channel: Belgium: Conveyance of molten iron”, in Modern Railways, page 432:
4
Automotive, Transport, Vehicles A similar rotational bearing used in automotive suspensions.
- Derived terms
- trunnioned, trunnionless, trunnion plate