Definitions for "Trunnion"
A cylindrical projection on each side of a piece, whether gun, mortar, or howitzer, serving to support it on the cheeks of the carriage. See Illust. of Cannon.
A gudgeon on each side of an oscillating steam cylinder, to support it. It is usually tubular, to convey steam.
A pin or grudgeon, especially either of two small cylindrical projections forming an axis on which a Dobsonian-mounted telescope (or a canon) pivots. If you've ever seen a Dob, then you know how much it looks like a canon
The replaceable end of a square bar weight distributing hitch which attaches to the ballmount.
Keywords:  bushing, bolt, bearing, ride, click
The ends of a universal joint cross where the bearings ride.
A "T" shaped bushing or bearing element through which the T-bolt passes. ( Click here for full definition.)
(n.) The part of a lever lock that accepts the key and stabilizes it, typically a single piece or an assembly consisting of some combination of a nose, guide and foot. Source: Lock Industry Standards and Training (LIST) Council
Keywords:  thrust, angle, strong, back, see
See Strong Back or Thrust Angle.
Keywords:  axis, ball, valve, vertical, upper
Upper and lower supports used to keep the ball under pressure.
The part of a ball valve which holds the ball on a fixed vertical axis and about which the ball turns.