Drill America D/A29S-SET 29 Piece Screw Machine Drill Bit Set

The Drill America 29-piece 135-degree split point heavy-duty drill bit set, manufactured to the National Aerospace Standard 907, comes in a metal case. These drills are self-centering and reduce thrust, making them ideal for portable or machine drilling. The short, rugged construction of these tools performs well in a broad range of materials in the iron and steel families.

Screw machine drills are popular in the automotive and construction industries, often used in screw machine set-ups where spindle clearance is limited. Sizes smaller than #52 have the standard 118-degree point. High-speed steel tools are well-suited for most general-purpose applications, offering a combination of hardness and toughness for wear resistance.

The black oxide treatment adds lubricity and creates small pockets on the surface of the tool, which act to hold coolant near the cutting edge. The round shanks allow the use of a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut), the spiral fluted tools evacuate chips up and out of the cut, reducing clogging.

The set includes fractional sizes ranging from 1/16" to 1/2" in 1/64" increments. The high-speed steel tools are suitable for most general-purpose applications, providing a balance of hardness and toughness to ensure wear resistance.

The black oxide treatment enhances the tools' lubricity and creates small pockets on the surface that help hold coolant near the cutting edge. The round shanks of these drill bits allow for use with a wide variety of toolholding systems.

When operated in a counterclockwise direction (right-hand cut), the spiral fluted tools effectively evacuate chips up and out of the cut, minimizing the risk of clogging. This feature improves the overall efficiency and performance of the drill bits.

The Drill America 29-piece 135-degree split point heavy-duty drill bit set, enclosed in a metal case, is a versatile and reliable tool for a wide range of drilling applications in the iron and steel industries, as well as in the automotive and construction sectors.

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