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.
References in periodicals archive ?
Tenders are invited for Supply of Bit breaker, bit gauge and mud bucket
Katana bits are also available in shankless configurations for minimum bit length, made possible by an innovative bit breaker system.