Science Fair Project Encyclopedia
- The word jackhammer is also used in the name of the type of combat shotgun called the Pancor Jackhammer.
A jackhammer (known as a pneumatic drill outside the United States and Canada) is a portable drill operated by compressed air and used to drill rock, break up pavement, etc. It works by jabbing with its bit, not by rotating. A hydraulic jackhammer (on a much larger scale) may be fitted to mechanical excavators and is widely used on roadworks, quarrying and general construction works. It is impractical for use on walls and steep slopes: it relies on its weight to operate, and is highly difficult (and impractical) to use in such situations.
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details