MSHA - Code of Federal Regulations - 30 CFR 77.1010
Skip to content
MSHA - Title 30 CFR
30 CFR § 77.1010
Collaring holes.


(a) Starter steels shall be used when collaring holes with hand-held drills.

(b) Men shall not hold the drill steel while collaring holes, or rest their hands on the chuck or centralizer while drilling.