Precision Twist CO500 12 Cobalt Steel Extra-Long Drill Bit Bronze Oxide Finish

Description

Precision Twist CO500 12 Cobalt Steel Extra-Long Drill Bit, Bronze Oxide Finish, Round Shank, Spiral Flute, 135 Degree Point Angle, 11/64" (Pack of 12)
NAS 907 J standards, for use in the aerospace industry
High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling into hard substances
135-degree split-point angle, for self-centering, to reduce walking, for use with hard materials, and to reduce pressure on cutting edges
Gold oxide finish, to help retain cutting fluid and prevent chip to tool welding
Extra-length, for deeper holes and more reach than regular length
The Precision Twist CO500-12 extra-length drill bit is made of high speed steel (HSS) and cobalt with a bronze oxide finish that drills holes into a wide variety of metals and synthetic materials. It can drill to a depth up to four times the diameter of the drill size. The shank diameter is the same as the drill size. The CO500 series has a N flute form, with a regular helix (21- to 34-degree) angle, and performs when drilling into alloy steel, nodular graphite, malleable cast iron, alloyed titanium, or alloyed nickel. The extra length and 135-degree split-point drill geometry provide extra reach and ensure a more accurate hole by reducing walking when the hole is started. The bronze oxide is a low temperature heat treatment which reduces grinding stress within the tool, and has an appealing, easy-to-identify bronze color. The finish retains lubricant to aid in wear resistance and chip flow. Bronze oxide is commonly used to identify cobalt steel tools. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge. The extra length allows for more freedom in being able to drill a wider variety of materials. Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common of drill bit used. Twist drill bits can be used in hand-operated drills, standalone drill presses, or a lathe. They are made to ANSI and NAS 907 J industry standards, which ensure that drill bits around the world conform to the same specifications. Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.
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