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On 8 May 1987, George Alexander, a millworker, was severely injured when a saw blade shattered after contact with a tree spike and cut his jaw in half. [ 5 ] [ 6 ] Louisiana-Pacific , Alexander's employer, offered a $20,000 reward for information leading to the alleged tree spiker, but no charges were filed in this incident. [ 7 ]
Carbide-tipped saw blades The saw blade's teeth are tipped (via welding) with small pieces of sharp tungsten carbide block. This type of blade is also called TCT (Tungsten Carbide-Tipped) saw blade. Carbide-tipped saw blades are widely used to cut wood, plywood, laminated board, plastic, glass, aluminum and some other metals. Solid-carbide saw ...
The saw blade for this type of saw enters vertically into the material. These saws are often used as layer saws, whereby a multitude of tubes, profiles, or bars can be simultaneously cut horizontally. In 1974, the first carbide saw with a vertical slide was developed by Arno Willemeit, the co-inventor of the Braunschweig tooth geometry. [5]
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.
Because of its large and sharp head, the McLeod is an awkward tool to transport and store, and is often considered undesirable. Some McLeod [6] tools are made with a removable blade to partially mitigate this problem. Ideally, it is carried with the tines pointing toward the ground for safety, with a sheath over the cutting edge.
The coping saw blade is removable by partially unscrewing the handle and can be installed in the frame such that it cuts on either the push stroke (teeth pointing away from the handle) or pull stroke (teeth pointing towards the handle). [4] The blade is prevented from rotating by means of the short steady bar provided where the blade is attached.