Trunnion ring

(Gun.) a ring on a cannon next before the trunnions.

See also: Trunnion

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The mixing vessel rotates on exterior trunnion rings, eliminating the need for internal shaft seals prone to failure when mixing abrasives.
Rotary batch mixer
Because the drum rotates on external trunnion rings, there is no internal shaft with seals immersed in the material, eliminating a maintenance and cross-contamination problem.
Switch to rotary batch mixer cuts costs and boosts output
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