Encyclopedia

bell mouth

bell mouth

[′bel ‚mau̇th]
(design engineering)
A flared mouth on a pipe opening or other orifice.
(engineering)
A defect which occurs during metal drilling in which a twist drill produces a hole that is not a perfect circle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in
References in classic literature
I was in full career, when I heard the cough right overhead, and jumping back and looking up, beheld a man's head in a tall nightcap, and the bell mouth of a blunderbuss, at one of the first-storey windows.
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PG-Series Bore Gages can be used to examine the entire bore for diameter, taper, barrel, bell mouth, out-of-round and lobing.
PG-Series Bore Gages
As a result, a bell mouth can be produced at the top of a threaded hole.
Combination thread mills find niche, cut cycle time
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