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Circular saws may also be loosely used for the blade itself. Circular saws were invented in the late 18th century and were in common use in sawmills in the United States by the middle of the 19th century. A circular saw is a tool for cutting many materials such as wood, masonry, plastic, or metal and may be hand-held or mounted to a machine.
Sawing non-ferrous material, such as aluminum, brass, plastic and wood with carbide tipped circular saw blades began in the 1930s. However, attempts to cut ferrous material with carbide tips failed because the existing saws lacked the speed, rigidity, and innovation required to transfer high force with low vibration.
A motorized miter saw. A miter saw or mitre saw is a saw used to make accurate crosscuts and miters in a workpiece by positioning a mounted blade onto a board. A miter saw in its earliest form was composed of a back saw in a miter box, but in modern implementation consists of a powered circular saw that can be positioned at a variety of angles and lowered onto a board positioned against a ...
Pendulum saw or swing saw, side view, a circular saw hung from a swinging arm, for cross cutting wood. Shown in the cutting position. A pendulum saw or swing saw is a mechanically powered circular saw with the blade mounted so it can swing into the material.
Panel saws can have one main saw blade, or a scoring along with a main saw blade. Scoring is used to create a groove, especially in double side laminate before the main saw rips the piece in two, to avoid chipping. The scoring saw rotates in an opposite direction, as the main saw to avoid chipping.
Cold saws use either a solid high-speed steel (HSS) [3] or tungsten carbide-tipped, resharpenable circular saw blade. [4] They are equipped with an electric motor and often a gear reduction unit [5] to reduce the saw blade's rotational speed while maintaining constant torque. This allows the HSS saw blade to feed at a constant rate with a very ...