Size:1/8 in The Onsrud Cutter 67-800 series jobber length drill bit is made from solid carbide with an uncoated (bright) finish and has an 8-facet point for use in general-purpose drilling applications on difficult-to-machine composite materials. The drill bit point has two sets of cutting edges, one with a 90-degree point and the other with a 118-degree point, that reduce the possibility of delamination when drilling composites, carbon fiber, mechanical plastics, and fiber-reinforced plastics. Solid carbide is harder than high-speed or cobalt steel, provides longer tool life at higher speeds, and produces close-tolerance holes in hard materials. The uncoated finish has no additional surface treatment or coating. An 8-facet point has four cutting edges (instead of the standard two) to prevent delamination when drilling difficult-to-machine composite materials. The round shank accommodates most drill chucks. Drill bits are cutting tools used to make holes in a range of materials using machines such as handheld portable drills, machining centers, and lathes. Drill bits come in a variety of lengths and types, the most common of which is the twist drill bit. The round, twisted shaft of the twist drill bit typically has two cutting edges and flutes. The helical twist of the flutes brings chips up and away from the cutting edges and allows for coolant to reach the cutting edges. Jobber length twist drill bits, the most common length of twist drill bit, offer a good compromise of length and reach for the widest range of materials and applications. Mechanic's length twist drill bits (also called maintenance length) are a little shorter than jobber length and less prone to deflection when drilling. Short length twist drill bits (also called stub or screw-machine length) are the shortest and stiffest twist drill bits, helping to reduce the chance of deflection or breakage when drilling. Reduced shank twist drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with a 1/4", 1/2", or 3/4" drill chuck to create large holes. Long length twist drill bits (also called taper length) are a little longer than jobber length, allowing for deeper holes and longer reach. Extra-long length twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.LMT Onsrud manufactures cutting tools, including drill bits, end mills, and engraving tools, for use with materials ranging from composites to titanium. The company, founded in 1946 and headquartered in Waukegan, IL, meets International Organization for Standardization (ISO) standard 9001.
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