High Speed Steel Aircraft Extension Drill Bit (Pack of 6)

The D/AA/C series High-Speed Steel premium quality drill bit from Drill America is manufactured to meet the National Aerospace Standard 907. The 135-degree split point design is self-centering, which helps to reduce thrust. This drill bit is ideal for drilling in mild steels, particularly when extra length is required to reach the desired depth.

The drill bit features a black oxide surface treatment that enhances its abrasion resistance, reduces chip welding, and improves chip flow. High-speed steel tools, such as this one, are well-suited for a wide range of general-purpose applications, providing a balance of hardness and toughness for improved wear resistance.

The black oxide treatment also adds lubricity to the tool and creates small pockets on the surface that help to hold coolant near the cutting edge, further improving performance. The round shanks on these drill bits allow for use with a variety of toolholding systems, providing flexibility in the workshop.

When the drill bit is used in a counterclockwise (right-hand cut) direction, the spiral flutes evacuate chips up and out of the cut, helping to reduce the risk of clogging. This feature enhances the efficiency and productivity of the drilling process.

In summary, the Drill America D/AA/C series High-Speed Steel premium quality drill bit is a high-quality tool that meets the stringent National Aerospace Standard 907. Its advanced features, such as the self-centering split point, abrasion-resistant black oxide coating, and spiral flutes, make it a versatile and reliable choice for a wide range of drilling applications, particularly in mild steel materials.

product information: