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It is a standard [1] tool during wildfire suppression and trail restoration. [2] The combination tool was created in 1905 by Malcolm McLeod, a United States Forest Service ranger at the Sierra National Forest. [3] [4] The McLeod was originally designed to rake fire lines with the teeth and cut branches and sod with the sharpened hoe edge.
Special tools and skills are more often required, and sharpening is often best done by a specialist rather than the user of the tool. Examples include: Drill bits - twist drills used for wood or steel are usually sharpened on a grinding wheel or within a purpose made grinding jig to an angle of 60° from vertical (120° total) although sharper ...
Diamond plates can serve many purposes including sharpening steel tools, and for maintaining the flatness of man-made waterstones, which can become grooved or hollowed in use. Truing (flattening a stone whose shape has been changed as it wears away) is widely considered essential to the sharpening process but some hand sharpening techniques ...
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Unibit may refer to: Unibit (drill bit), a roughly conical drill bit with a stairstep profile; Unibit (unit), 1 bit of information; Unibit PLL, a type of phase-locked loop (PLL) Unibit (font), an opensource Chinese font containing Chinese, Japanese, and Korean languages ideographs
Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, [1] or a flexible surface with hard particles, such as sandpaper. Additionally, a leather razor strop , or strop, is often used to straighten and polish an edge.
A special tool grinder is available for sharpening or reshaping cutting surfaces on twist drill bits in order to optimize the bit for a particular material. Manufacturers can produce special versions of the twist drill bit, varying the geometry and the materials used, to suit particular machinery and particular materials to be cut.
Fire hardening is the process of removing moisture from wood, changing its structure and material properties, by charring it over or directly in a fire or a bed of coals. This has been thought to make a point, like that of a spear or arrow , or an edge, like that of a knife or axe , more durable and efficient for its use as a tool or weapon.