Drill America D/A833SD-CO-SET 33 Piece Cobalt Reduced Shank Drill Bit Set

The Drill America 33-piece 135-degree split point heavy-duty drill bit set comes in a metal case. The set features common flute and overall length, allowing for minimal adjustment during tool changes. The drill bits are precision-ground for a high degree of concentricity between the shank and body diameter, making them ideal for drilling in tough, high-tensile strength materials.

The cobalt steel tools used in this set are similar to high-speed steel, but they contain more cobalt, which improves their performance when cutting harder metals such as stainless steel or nickel alloys. The gold oxide surface treatment used on these tools is thinner than the typical black oxide, but the performance is similar to that of uncoated tools.

The round shanks on these drill bits allow for use with a wide variety of toolholding systems. When the spiral-fluted tools are run in a counterclockwise direction (right-hand cut), they effectively evacuate chips up and out of the cut, reducing the risk of clogging.

The set includes fractional sizes ranging from 1/2 inch to 1 inch, with 1/64-inch increments. The 1/2-inch sizes feature reduced shanks.

In summary, this Drill America 33-piece 135-degree split point heavy-duty drill bit set is designed to provide efficient and reliable performance when drilling in tough, high-tensile strength materials. The cobalt steel construction, gold oxide surface treatment, and spiral-fluted design contribute to the overall effectiveness of this tool set.

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