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A reciprocating saw is a type of handheld, small, machine-powered saw, in which the cutting action is achieved through a push-and-pull ("reciprocating") or back-and-forth motion of the blade. The original trade name, Sawzall , is often used in the United States , where Milwaukee Electric Tool first produced a tool of this type in 1951.
In 1992, Black & Decker began a major effort to rebrand its professional quality and high-end power tools to DeWalt. In 1994, DeWalt took over the German woodworking power tool producer ELU, and used ELU's technology to expand their tool line. As of 2001, they manufacture and sell more than 200 hand power tools and 800 accessories. [2]
The cut patterns on ancient boards may be observed sometimes to bear the unique cutting marks left by saw blades, particularly if the wood was not 'smoothed up' by some method. As for preservation of hand saws, twenty-four saws from eighteenth-century England are known to survive. [1] Materials for saw blades have varied over the ages.
Saw blade "grabbing" occurs more frequently during ripping than cross-cutting (cuts made to wood or stone across its main grain or axis). It can occur with both hand saws and bandsaws but is more dangerous with a circular saw as areas of the circular blade close to the cutting area are moving in different directions.
Radial Arm Saw. A radial arm saw is a cutting machine consisting of a circular saw mounted on a sliding horizontal arm. Invented by Raymond DeWalt in 1922, the radial arm saw was the primary tool used for cutting long pieces of stock to length until the introduction of the power miter saw in the 1970s.
In the late 1970s, Thomas Lie-Nielsen (pronounced "Lee-Neelsen" [2]) worked for Garry Chinn's company, Garrett Wade.In 1981, Garrett Wade's supplier of an adapted Stanley #95 edge trimming block plane, Ken Wisner, was ready to leave the business, so Lie-Nielsen acquired the tooling, plans and components necessary for producing the #95.
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