Cleveland 2513 Cobalt Steel Long Length Drill Bit, Gold Oxide Finish, Round Shank with Tang, 118 Degree Notched Point, 1/2" Dia. x 7 3/4" Lg (Pack of 1)
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The Cleveland 2513 long-length, high-speed steel (HSS) containing cobalt drill bit has a 30-degree helix angle, with a 118-degree notched-point drill point and gold oxide surface treatment, which is designed for heavy-duty drilling applications. The shank diameter is the same as the drill size. This drill has high red hardness for extended wear life in high heat conditions.
The 2513 series performs best when drilling into stainless steel, carbon steel, and cast iron. Gold also known as straw oxide is a low-temperature heat treatment that reduces grinding stress within the tool. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. The twist of the flutes brings chips up and away from the cutting edge. The 118-degree notched-point drill point works well for hard and tough materials. The notched point can withstand higher thrust loads and has same benefits as a split-point design. The long, also known as taper length has more reach than Jobber-length bits and allows for deeper holes. Round shanks allow use with a wide variety of tool holding systems. The round shank with tang provides a means to securely hold the drill bit in the tool holder. Made from cobalt steel which can be run at faster speeds and stays sharp longer than HSS tools, while offering resistance to heat and abrasion.
The tolerances for various aspects of the Cleveland drill bits are: drill diameter range through 1/8 +0.0000 /-0.0005 , over 1/8 to 1/4 +0.0000 /-0.0007 , over 1/4 through 1/2 +0.0000 /-0.0010 , over 1/2 to 1 +0.0000 /-0.0012 , over 1 to 2 +0.0000 /-0.0015 , over 2 to 3-1/2 +0.0000 /-0.0020 ; drill overall length and flute length #80 through 1/8 +0.1250 /-0.0626 , over 1/8 to 1/2 +0.1250 /-0.1250 , over 1/2 to 1 +0.2500 /-0.1250 , over 1 to 2 +0.2500 /-0.2500 , over 2 to 3-1/2 +0.3750 /-0.3750 ; drill point angle diameter range 1/16 to 1/2 included angle 118 or 135 degrees +/-5 degrees, over 1/2 to 1 1/2 included angle 118 degrees +/-3 degrees, over 1-1/2 to 3-1/2 includes angle 118 degrees +/- 2 degrees; drill lip height diameter range 1/16 to 1/8 total indicator variation 0.0020 , over 1/8 to 1/4 total indicator variation 0.0030 , over 1/4 to 1/2 total indicator variation 0.0040 , over 1/2 to 1 total indicator variation 0.0050 , over 1 to 3 1/2 total indicator variation 0.0060 .
Drill bits are cutting tools used to make holes in a range of materials. They are used in machines such as handheld portable drills, drill presses, machining centers, and lathes. Drill bits come in a variety of types and lengths. Twist drill bits are the most common type of drill bit. They are a round, twisted shaft, end-cutting tool with two or more cutting edges and two or more flutes. Long length bits (also called taper length) are twist bits that are a little longer than jobber length, allowing for deeper holes and longer reach.
Greenfield Industries manufactures tools under the brand names Cleveland, Chicago-Latrobe, Cle-Line, Vermont Tap & Die, Bassett, Putnam Tools, Geometric, Vers-O-Tool, H & G, and Acme-Fette. The company owned by Top-Eastern Group and headquartered in Seneca, SC, makes tools that meet American National Standards Institute (ANSI), National Aerospace Standard (NAS), and Deutsches Institut f r Normung (DIN) standards.
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