Drill America 60 Piece m42 Cobalt Screw Machine Drill Bit Set (Wire Sizes: #1 - #60), D/ASTCO Series

The Drill America 60 piece heavy-duty drill bit set with 135-degree split point is housed in a durable metal case. Compliant with National Aerospace Standard 907, these drills are designed to be self-centering and reduce thrust, making them ideal for portable or machine drilling. Their short, rugged construction allows them to perform well with a variety of materials in the iron and steel families, making them popular in the automotive and construction industries. This set also includes screw machine drills, which are commonly used in setups with limited spindle clearance.

For sizes smaller than #52, the drills have a 118-degree standard point. Made of cobalt steel, these tools are similar to high-speed steel but have more cobalt, providing improved performance when cutting harder metals such as stainless steel or nickel alloys. They are also coated with a gold oxide treatment, which is thinner than black oxide and helps identify the cobalt steel tools. The performance of these coated tools is similar to uncoated ones. Additionally, the round shanks of these drills allow for use with various toolholding systems.

When used in a counterclockwise direction (right-hand cut), the spiral fluted tools in this set effectively evacuate chips out of the cut to reduce clogging. The set includes wire gauge sizes ranging from #1 to #60, providing a comprehensive range of options for different drilling needs. Overall, this drill bit set is a versatile and high-performance option for cutting through tough metals with precision and efficiency.

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