A power tool is tool powered by an electric motor , an internal combustion engine , a steam engine , compressed air , direct burning of fuels and propellants , or even natural power sources like wind or moving water. Power tools are classified as either stationary or portable , where portable means handheld. They are used in industry , in construction , and around the house for driving , drilling , cutting , shaping , sanding , grinding , polishing , painting and heating. Stationary power tools for metal working are usually called machine tools. The term machine tool is not usually applied to stationary power tools for woodworking , although such usage is occasionally heard and in some cases , such as drill presses and bench grinders , exactly the same tool is used for both woodworking and metalworking .
Stationary power tools are prized not only for their speed , but for their accuracy. A table saw not only cuts faster than a hand saw , but the cuts are smoother , straighter and more square than even the most skilled man can do with a hand saw. Lathes produce truly round objects that cannot be made in any other way.
Common power tools include the drill , various types of saws , the router , the electric sander and the lathe.
The term power tool is also used in a more general sense , meaning a technique for greatly simplifying a complex or difficult task.
1" D - Handle 3-Mode, SDS-PLUS Rotary Hammer
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