Break-lathe or gap-lathe. A lathe having a break or gap in the bed and beneath the face plate to let chucked work of large diameter pass.
Broach. A toothed tool for cutting the walls of a hole.
Broaching-press. A machine that forces a broach to its cut.
Bunter-dog. A work-gripping device for a planing machine, and consisting of a piece having a hook end to engage in the T-slot of the table, and a set-screw to bind the work.
Butt-joint. A riveted joint in which the ends of the plate abut fair, one against the other.
Butt-strap. A strip or band of iron employed to hold the joint together in a butt-joint.
Butt-weld. A weld in which the end of one piece merely abuts against the other when the two pieces are put together to weld.
Buzz-planer. A wood-planing machine in which the work is fed by hand.
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Calender-roll. A roll for calendering paper.