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In 1886, Forstner patented the Forstner bit. [1] The bit was revolutionary as it did not feature the lead screw (which Forstner called the "gimlet-point") or the cutting lips of more conventional wood boring bits, [clarify] and thus proved especially useful to gunsmiths and high-end woodworkers. The bit was unsurpassed in drilling a smooth ...
A Forstner bit could bore the mounting hole for the hinge, but particle board and MDF are very abrasive materials, and steel cutting edges soon wear. A tungsten carbide cutter is needed, but the complex shape of a forstner bit is difficult to manufacture in carbide, so this special drill bit with a simpler shape is commonly used. It has cutting ...
11/32 inch drills: long-series Morse, plain Morse, jobber. The image shows a long-series drill compared to its diametric equivalents, all are 11 ⁄ 32 inch (8.7313 mm) in diameter. The equivalent Morse taper drill shown in the middle is of the usual length for a taper-shank drill. The lower drill bit is the jobber or parallel shank equivalent.
SDS-plus drill bit shank SDS-max drill bit shanks. The diameter of a SDS Plus shank is 10 millimeters. The SDS Max is larger with an 18 mm shank diameter, while the SDS Quick has a smaller 6 mm shank diameter. The SDS shank is simply pushed into the spring-loaded chuck without tightening.
Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.
1874 Forstner bit Forstner bits, also known as Forstner flange bits or webfoot augers, bore precise, flat-bottomed holes in wood, in any orientation with respect to the wood grain. Forstner bits can cut on the edge of a block of wood, and can cut overlapping holes.