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Drill America 3/16" x 12" High Speed Steel Aircraft Extension Drill Bit (Pack of 12), DWDA/C Series
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Drill America 3/16" x 12" High Speed Steel Aircraft Features
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High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
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Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge
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Round shanks allow use with a wide variety of toolholding systems
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When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
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Manufactured to National Aerospace Standard 907
About Drill America 3/16" X 12" High Speed Steel Aircraft
Drill America DWDA/C Series High-Speed Steel drill bit is manufactured to National Aerospace Standard 907. 135 split point is self-centering and reduces thrust. Ideal for drilling in mild steels where extra length for reach is required. They have a black oxide surface treatment that is abrasion resistant, reduces chip welding and improves chip flow.
