General Details: A drill or drilling machine is a tool primarily used for making round holes or driving fasteners. It is fitted with a bit, either a drill or driver, depending on the application, secured by a chuck. Some powered drills also include a hammer function. Drills vary widely in speed, power, and size. They have characteristically corded electrically driven devices, with hand-operated types dramatically decreasing in popularity and cordless battery-powered ones proliferating, drills are commonly used in woodworking, metalworking, construction, machine tool fabrication, construction, and utility projects.
Specially designed versions are made for medicine, space, and miniature applications, there are many types of drills: some are powered manually, others use electricity (electric drill) or compressed air (pneumatic drill) as the motive power and a minority are driven by an internal combustion engine (for example, earth drilling augers). Drills with a percussive action (hammer drills) are mostly used in hard materials such as masonry (brick, concrete, and stone) or rock.
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