Drill America GLBCOX61/4 1/4 x 6 Cobalt Aircraft Extension Drill Bit, GLBCO Series

Drill America Cobalt Aircraft Extension Drills, manufactured to National Aerospace Standard 907, are similar to high-speed steel but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. The 135° split point is self-centering and reduces thrust, while sizes smaller than 1/16 in. have the 118° standard point. These drills are available in 6 in. and 12 in. overall lengths when extra reach is required, and they are effective in drilling tough, high tensile strength materials like stainless steel, inconel, and titanium.

The round shanks on Drill America Aircraft Extension Drills allow for use with a wide variety of tool holding systems. The gold oxide surface treatment is a thinner oxide than the typically used black oxide, yet it provides similar performance to uncoated tools. This surface treatment is used to identify the cobalt steel construction of these drills.

The 135° split point tip on the Drill America Cobalt Aircraft Extension Drills helps prevent the drill from walking, ensuring accurate and precise hole placement. The additional cobalt content in the steel composition, compared to standard high-speed steel, enhances the drills' performance when working with harder, more challenging materials. The 6-inch overall length option is well-suited for applications where extended reach is necessary, allowing the user to access confined or hard-to-reach areas.

In summary, the Drill America Cobalt Aircraft Extension Drills are a specialized tool designed for demanding drilling applications involving tough, high-tensile strength metals. The combination of the 135° split point, cobalt-enhanced steel, and available length options make these drills a versatile and effective choice for aerospace, automotive, and other industrial manufacturing sectors.

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