A power drill that works by delivering a rapid succession of blows, used chiefly for drilling in masonry or rock.
- ‘The hammer drill, with its ratchet-like impact mechanism, works best on brick, block, and light concrete, but not hard concrete (that is, high compressive strength concrete or that with large aggregate).’
- ‘A contractor can switch the operating mode of the DV14DV rotary hammer from a driver drill to a hammer drill with just a turn of the tool's selection dial.’
- ‘The next door neighbour getting carried away with his hammer drill when the mood takes him, and his Alsatian's demented reactions, can rapidly unravel your sanity.’
- ‘If you have a lot of holes to drill or are drilling unusually hard materials, you may need the extra power of a hammer drill.’
- ‘On one job, she dangled beneath the 90-foot-high arches of New York City's Cathedral Church of St. John the Divine for more than three hours while installing crack gauges with a hammer drill.’