rock bit - a drill bit that has hardened rotating rollersroller bitdrill bit, drilling bit - a bit used in drilling for oil
rock bit
rock bit
[′räk ‚bit] (engineering) Any one of many different types of roller bits used on rotary-type drills for drilling large-size holes in soft to medium-hard rocks.
rock bit
noun
Synonyms for rock bit
noun a drill bit that has hardened rotating rollers