A power tool is a
tool powered by an
electric motor, a compressed air motor, or a gasoline engine. 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 cutting, shaping, drilling, sanding, painting, grinding, and polishing. Stationary power tools for metalworking 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, the exact same tool is used for both woodworking and metalworking. The lathe is the oldest power tool, being known to the ancient Egyptians (albeit in a hand-powered form). Early
industrial revolution-era factories had batteries of power tools driven by belts from overhead shafts. The prime power source was a water wheel or (later) a steam engine. The introduction of the electric motor (and electric distribution networks) in the 1880s made possible the self-powered stationary and portable tools we know today.
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Equipment operated hydraulically or by compressed air for making up and breaking out Drill Pipe, Casing, Tubing, and Rods
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