ball grinder

ball grinder

[′bȯl ‚grind·ər]
(mechanical engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Jig grinders, ultra-precision bearing ball grinders, and a whole spectrum of other specialized grinders could each easily be the topic of an article longer than this one.