bit breaker

bit breaker

[′bit ‚brāk·ər]
(design engineering)
A heavy plate that fits in a rotary table for holding the drill bit while it is being inserted or broken out of the drill stem.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Katana bits are also available in shankless configurations for minimum bit length, made possible by an innovative bit breaker system.