rotary drill
nounUK /ˈrəʊtəri drɪl/
US /ˈroʊtəri drɪl/
A rotary drill is a tool that spins around fast to make holes.
The worker used a rotary drill to make a hole in the wall.
OTHER MEANINGS
2. A machine that turns a drill bit to dig into rock or ground.
They used a rotary drill to dig deep into the ground for oil.
3. A dental tool that spins to clean or fix teeth.
The dentist used a rotary drill to clean the tooth.
4. A type of drill used in mining that rotates continuously.
The miners relied on a rotary drill to reach the coal seam.