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Drills
If you want to make a round hole in something
by removing material, then you need a drill.
Other tools and instruments (such as a nail)
can make a hole, but a drill does it by cutting
away material in the hole rather than forcing
it aside.
There are four types of drills:
- drill press, a mounted drill designed mainly for drilling
metal but can be used anytime you need a
controlled or repeatable drilling angle and
depth.
- hammer drill (impact drill), a hand held drill for hard
surfaces
- hand drill, a manually operated hand drill
- power drill, an electric or compressed air driven hand
drill
The actual hole creation is done
by the drill bits, which in many cases are interchangeable
between types of drills but are
specially
designed for drilling particular
materials. |
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