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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 ...
These saws are characterized by a cast iron top on a full-length steel base, generally square in section, with radiused corners. Two 3 ⁄ 4-inch-wide (19 mm) miter slots (1 inch [25 mm] wide on the largest saws) are located parallel to the blade, one to the left of the blade and one to the right.
In 1966, Rockwell invented the world's first power miter saw. In 1981, Rockwell's power tool group was acquired by Pentair and re-branded Delta Machinery. In 2004, Pentair's Tools group was acquired by Black & Decker. [4]
This kind of saw is now usually called a scroll saw. The modern portable jigsaw, with a rigid blade secured at one end and cutting on the up-stroke, was introduced in 1947 by Scintilla AG (later acquired by Bosch). [2] A jigsaw power tool is made up of an electric motor and a reciprocating saw blade.
The most common blade is the 12 inch or 300 mm length. Hacksaw blades have a hole at each end for mounting them in the saw frame and the 12 inch / 300 mm dimension refers to the center to center distance between these mounting holes. [4] The kerf produced by the blades is somewhat wider than the blade thickness due to the set of the teeth.
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.
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