Drill America 3/16 Cobalt Drill Bit with Hex Shank, COHEX Series

The COHEX Series from Drill America is made of heat-resistant cobalt and ground to a heavy-duty 135-degree split point. These drills feature a common flute and overall length, minimizing the need for adjustment during tool changes. Precision ground, they exhibit a high degree of concentricity between the shank and body diameter, making them ideal for drilling in tough, high-tensile strength materials. This expands the size range capacity of a portable drill chuck.

Similarly, these drills are also well-suited for low and medium-tensile strength materials, thanks to their precision grinding and common flute and overall length design. The 1/4-inch hex shank can be used in quick-change impact drivers, with a standard 3/8-inch length between the chucking slot on the shank and the end of the shank.

Cobalt steel tools, like those in the COHEX Series, 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-degree split point tip provides self-centering and reduces thrust, compared to the conventional 118-degree tip, preventing the drills from "walking" during use.

The gold oxide surface treatment used on these tools is a thinner oxide layer than the more commonly used black oxide, but the performance is similar to that of uncoated tools. Manufactured to the National Aerospace Standard 907, the COHEX Series drills from Drill America are designed to deliver reliable, high-quality performance in a wide range of demanding applications.

In summary, the COHEX Series drills from Drill America are built to excel in both tough, high-tensile strength materials and low to medium-tensile strength applications. Their cobalt steel construction, 135-degree split point tips, and precision grinding ensure consistent, accurate performance, while the 1/4-inch hex shank and gold oxide surface treatment provide additional versatility and durability. These drills are a reliable choice for professionals and DIYers alike, meeting the exacting standards of the National Aerospace Standard 907.

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