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Difference between revisions of "Saws"
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[[File:Saws_1.jpg|thumb|200px|right|Saws - Hand Saw]] | |||
[[File:Saws_2.jpg|thumb|200px|right|Saws - Reciprocating]] | |||
[[File:Saws_3.jpg|thumb|200px|right|Saws - Mechanically operated]] | |||
'''Saws''' are any of various tools, either hand-operated or power-driven, having a thin metal blade or disk with a sharp, usually toothed edge, used for cutting wood, metal, or other hard materials. | |||
==Types== | |||
===Hand saws=== | |||
Hand-powered saws fall into three divisions, which are defined by the way they hold the blade stiff (a requirement to get an even, clean cut). | |||
A Hand saw uses either simply a blade thick enough to be stiff, or cuts on the pull stroke which reduces the stiffness requirement. This division includes the following specific types of saws: | |||
*Crosscut saw, for making cuts perpendicular to the grain | |||
*Rip saw, for cutting along the grain | |||
*Two-man saw, for cutting large logs or trees | |||
*Plywood saw, fine-toothed blade to reduce tearing of plywood | |||
*Veneer saw, two edged saw with fine teeth used to cut veneer | |||
*Hacksaw, fine-toothed tempered blade under tension for cutting metal, bone, and other hard materials. | |||
Although their use is dwindling the jigsaw and sabre saw (unpowered tools) may also refer to blade style saws. | |||
===Mechanically powered saws=== | |||
Mechanically powered saws mechanically move the teeth past the wood while the saw itself is held stationary. This is accomplished in one of three ways: the teeth are along the perimeter of a flat, circular blade; the blade reciprocates up and down rapidly; or the teeth are along one edge of a continuous band. | |||
===Reciprocating saw=== | |||
Reciprocating saw or sabre saw action similar to a jigsaw, but much larger, more powerful and with a longer stroke with the blade parallel to the barrel. Normally held in both hands, useful for demolition work or for cutting pipe. Sometimes powered by compressed air. | |||
==Videos== | |||
<youtube>yJz41jv_-Xg</youtube> | |||
<youtube>tYdGlwP3R6o</youtube> | |||