Cleveland 2011 High Speed Steel Jobbers' Length Drill Bit, Black Oxide, Round Shank, 135 Degree Split Point, Wire Size #25 (Pack of 10)
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The Cleveland 2011 cotter pin jobber length high-speed steel (HSS) drill bit has a 30-degree helix angle, with a 135-degree split-point drill point and black oxide surface treatment, which is designed for heavy duty drilling applications such as drilling holes for cotter pins. The shank diameter is the same as the drill size.
The Cleveland 2011 jobber length high-speed steel (HSS) drill bit has a 30-degree helix angle, with a 135-degree split-point drill point and black oxide surface treatment, which helps optimize performance in general-purpose drilling applications. The shank diameter is the same as the drill size.
While the 2011 series can be used on most materials, it is most suitable for drilling into free-machining stainless steel, alloy-tool steel, and cast iron. Black oxide improves lubricity, resists corrosion, and resists flaking. It also helps prevent buildup and welding of material on the tool's cutting edge when machining iron and steel. 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. 135-degree split-point reduces walking when starting a hole and penetrates more easily than a convention point. Round shanks allow use with a wide variety of tool holding systems. HSS is a common, general-purpose steel for cutting tools, offers toughness and shock resistance, and is compatible with a variety of materials.
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. 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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