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Cleveland 2331G High Speed Steel Short Length Drill Bit, Black Oxide, Round Shank, 135 Degree Split Point, Wire Size #1 (Pack of 12)
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About Cleveland 2331G High Speed Steel Short Length Drill
The Cleveland 2331G, also called CLE-MAX 2331G, is a short-length, vanadium steel drill bit with a 30-degree helix angle, a 135-degree point angle, and black oxide surface treatment, for general-purpose drilling applications. The 2331G series was designed for use in the aircraft industry, but is also suitable for other drilling applications. The shank diameter is the same as the drill size. The 2331G drill bit can be used on most materials, but is most suitable for drilling into various steels 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 removal and for coolant to enter the hole. The twist of the flutes brings chips up and away from the cutting edge. The 135-degree drill point reduces walking when starting a hole and penetrates more easily than a convention point. Round shanks allow use with a variety of tool holders. Vanadium steel is high-speed steel (HSS) with a high percentage of vanadium, for greater heat resistance and an increased ability to hold an edge over high-speed steel (HSS). This drill bit adheres to Deutsches Institut für Normung (DIN) 1897 standards. The tolerances for various aspects of the Cleveland 2331G drill bit 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 +/-
