Cleveland 2075A Cobalt Steel Jobbers' Length Drill Bit, TiAIN Coated, Round Shank, 135 Degree Notch Point, Wire Size #1 (Pack of 10)
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The Cleveland 2075A wide land, parabolic, jobber-length drill bit is made of cobalt, has 135-degree notched-point geometry and TiAlN surface treatment, and is suitable for deep hole drilling with precision holes. This series has higher speeds and feeds for increased productivity over standard drill bits. The round shank diameter is the same as the drill size.
The 2075A series has a wide land parabolic flute design that enhances chip removal. The coolant has a better flow to the drill point for heat dissipation, and can be used at higher speeds and feeds for increased productivity. The TiAlN coating resists heat better than TiN and TiCN coatings, helping increase tool life and performance. It also has increased hardness compared to TiN and may reduce the need for lubricants based on the application. The wider land increases the torsional strength of the drill which increases the hole tolerance for high precision work.
This series of drill bits are suitable for drilling into stainless steel, carbon steel, cast iron, aluminum, brass, plastic and nickel alloys. The spiral flutes act as a passageway for chip removal. The right-hand twist brings chips up and away from the cutting edge. The jobber length offers a good compromise between reach and rigidity. The inch sizes are manufactured to American National Standards Institute (ANSI) specification and metric sizes are manufactured to Deutsches Institut f r Normung (DIN) 338 specifications.
The 135-degree notched-point drill geometry ensures a more accurate hole by reducing walking when the hole is started. The notched point can withstand higher thrust loads, like those encountered when drilling tough alloys, than conventional point geometry.
The tolerances for various aspects of the Cleveland drill bits are: drill diameter range 0 to 1/8 +0.0000 /-0.0005 , over 1/8 to 1/4 +0.0000 /-0.0007 , over 1/4 to 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. Jobber drill bits are the most common length of twist bit. They offer a good comprise of length and reach to work with the widest range of materials and applications.
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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