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Cold saw blades are used to cut metal using a relatively slow rotational speed, usually less than 5000 surface feet per minute (SFM) (25 m/s), and a high chip load per tooth, usually between .001"–.003" (0.025–0.08 mm) per tooth. These blades are driven by a high power motor and high-torque gear reduction unit or an AC vector drive.
In 1982, Harbor Freight Tools opened its first retail store in Lexington, Kentucky, to sell returned merchandise from its mail order business. The original location was at 1387 East New Circle Road. It later moved to 1301 Winchester Road, Suite 213. The venture proved successful, and Harbor Freight Tools began to open stores across the United ...
A cutoff saw is used for cutting larger items, like heavy metal stock, metal studs, and for cutting large metal pipe. The cutting discs for this tool are usually 10 or 12 inches in diameter, with a composition like that of the smaller wheels mentioned above. When cutting heavy materials the cutting discs may require lubrication or coolant to ...
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.
These attributes are all necessary for carbide sawing. Also, the existing tooth geometry with positive cutting angles caused cracking of the carbide tips which were harder and consequently, more brittle than the high-speed steel (HSS) circular blades. The name carbide saw came from the tool, a circular saw blade, with silver soldered carbide tips.
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. If a bandsaw grabs, the ...