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Except where cost is a particular concern, this type is now obsolete. 'Low alloy' blades are still the only type available for the Junior hacksaw, which limits the usefulness of this otherwise popular saw. For several decades now, hacksaw blades have used high speed steel for their teeth, giving greatly improved cutting and tooth life. These ...
Blades for cutting wood are almost universally tungsten carbide tipped (TCT), but high-speed steel (HSS) blades are also available. The saw base can be adjusted for depth of cut and can tilt up to 45° and sometimes 50° in relation to the blade. Adjusting the depth of cut helps minimize kickback.
In 1919, Samuel Jacoff started a business in Pittsfield, Massachusetts manufacturing hacksaw blades. In 1929, he merged his business with Great Neck Manufacturing, another blade manufacturer. In 1941, the company moved to its current location of Mineola, New York. [5]
High-speed steel (HSS) The whole saw blade is made of High-Speed Steel (HSS). HSS saw blades are mainly used to cut steel, copper, aluminum and other metal materials. If high-strength steels (e.g., stainless steel) are to be cut, the blades made of cobalt HSS (e.g. M35, M42) should be used. Tungsten carbide
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 1951, Milwaukee Electric Tool Corporation released its Milwaukee Sawzall reciprocating saw. The Sawzall was the first portable hacksaw to have a reciprocating mechanism. Milwaukee Tool also developed a full line of saw blades that were capable of cutting all materials. [7]
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