Drill America Cobalt Aircraft Extension Drill Bit, GLBCO Series

Drill America's Cobalt Aircraft Extension Drills are similar to high-speed steel, but with a higher cobalt content for improved performance when cutting harder metals such as stainless steel or nickel alloys. Compared to the typically used black oxide, the gold oxide surface treatment on these drills is a thinner oxide layer, but the performance is still on par with uncoated tools.

These aircraft extension drills are manufactured to the National Aerospace Standard 907. The 135-degree split point design is self-centering, which helps to reduce thrust during the drilling process. Drill sizes smaller than 1/16 inch feature the standard 118-degree point.

Drill America offers these aircraft extension drills in two overall lengths - 6 inches and 12 inches - to provide the extra reach required for certain applications. These drills are particularly effective in drilling tough, high-tensile-strength materials like stainless steel, Inconel, and titanium.

The 135-degree split point tip helps to prevent the drill from wandering or walking during use. Additionally, the round shanks on these drills allow them to be used with a wide variety of tool-holding systems, providing versatility for the end-user.

As mentioned earlier, the gold oxide surface treatment is thinner than the traditional black oxide finish, but it still serves to identify these drills as containing cobalt steel. The performance of the gold oxide-treated drills is comparable to that of uncoated tools.

The 6-inch overall length of these aircraft extension drills is particularly useful in situations where extra reach is required for the drilling operation. This additional length can be crucial when working in confined spaces or accessing hard-to-reach areas.

In summary, Drill America's Cobalt Aircraft Extension Drills offer a range of features and benefits that make them well-suited for drilling tough, high-strength materials. The 135-degree split point, self-centering design, round shanks, and available lengths of 6 inches and 12 inches provide versatility and performance to meet the demands of various aerospace and industrial applications. The gold oxide surface treatment provides a visual identifier for the cobalt steel composition, while maintaining similar performance to uncoated tools.

product information: