Box groove

(Metal Working) a closed groove between two rolls, formed by a collar on one roll fitting between collars on another.

See also: Box

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
"But it cost me a couple of shots a day, at least a shot a day, not having the box grooves because that's my style of game.