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- Used to drill quickly through concrete, stone, block and brick.
- While the drill turns, the drill vibrates the chuck back and forth or side-to-side to help the bit chip the material while it is drilling.
- Many models have a mode selector, allowing the operator to choose rotation only, like a conventional drill, and hammer drill, which combines the drill and hammer action. Better models might offer a hammer only option for chisel and scraper attachments.
- Do not confuse with a rotary hammer, which can accommodate core bits up to 6” in diameter. These tools have unique bit drive and retention methods rather than the conventional geared chuck.
- Manufacturers will measure speed by rpm (revolutions per minute), and the hammer action by bpm (blows per minute).