hammer drill

hammer drill
: a percussion rock drill in which a plunger or hammer strikes rapid blows on the shank of a loosely held drill — compare piston drill

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ˈhammer drill 7 [hammer drill hammer drills] (BrE also perˈcussion drill) noun
a ↑drill that makes holes in stone or bricks by making very fast hitting movements as it turns
See also:percussion drill

Useful english dictionary. 2012.

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Look at other dictionaries:

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