Drill America 3/16 x 6 High Speed Steel Aircraft Extension Drill Bit (Pack of 12), D/AA Series

The D/AA/C series High-Speed Steel premium quality drill bit from Drill America is manufactured to National Aerospace Standard 907. The 135-degree split point is self-centering and reduces thrust, making it ideal for drilling in mild steels where extra length for reach is required. The drill bit features a black oxide surface treatment that is abrasion-resistant, reduces chip welding, and improves chip flow.

High-speed steel tools are well-suited for most general-purpose applications, offering a combination of hardness and toughness for wear resistance. The black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge. The round shanks allow for use with a wide variety of tool-holding systems.

When run in a counterclockwise direction (right-hand cut), the spiral-fluted tools evacuate chips up and out of the cut, reducing the risk of clogging. The drill bits are manufactured to the National Aerospace Standard 907, ensuring consistent quality and performance.

The D/AA/C series High-Speed Steel premium quality drill bits from Drill America are designed to meet the demands of aerospace and other industrial applications. The self-centering 135-degree split point, combined with the abrasion-resistant black oxide surface treatment, makes these drill bits a reliable choice for a variety of drilling tasks in mild steels. The high-speed steel construction, with its balance of hardness and toughness, ensures long-lasting performance and wear resistance, while the round shanks and spiral flutes provide versatility and efficient chip evacuation.

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