Drill America 3/16 Cobalt Drill Bits (Pack of 12), DWDCO Series

Manufactured to the National Aerospace Standard 907, the Drill America jobber length drill bits are made of heat-resistant cobalt, displaying higher red hardness that permits speeds up to 30 percent greater than High-Speed Steel drills. These drill bits are especially effective in drilling tough, high-tensile strength materials like PH stainless steel, Inconel, and titanium.

Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Gold oxide is a thinner oxide surface treatment than black oxide, typically used to identify cobalt steel tools, and the performance is similar to uncoated tools.

The round shanks of these drill bits allow for use with 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 to reduce clogging.

The use of cobalt in the manufacturing process of these drill bits contributes to their higher red hardness, enabling them to withstand greater speeds than their High-Speed Steel counterparts. This feature makes them particularly suitable for drilling through tough, high-tensile strength materials, such as PH stainless steel, Inconel, and titanium.

The gold oxide surface treatment is a distinguishing characteristic of these cobalt steel tools, which is thinner than the more commonly used black oxide. This surface treatment does not significantly impact the performance of the tools, as they maintain similar capabilities to uncoated tools.

The versatility of these drill bits is further enhanced by their round shanks, which allow for compatibility with a wide range of toolholding systems. This flexibility enables users to efficiently utilize these drill bits in various applications and machining setups.

When operated in a counterclockwise direction, the spiral fluted design of the drill bits facilitates the effective evacuation of chips from the cut, reducing the risk of clogging. This feature contributes to the overall efficiency and performance of the tools, particularly when drilling through challenging materials.

In summary, the Drill America jobber length drill bits, manufactured to the National Aerospace Standard 907, offer a superior solution for drilling through tough, high-tensile strength materials. Their cobalt-based composition, higher red hardness, and spiral fluted design make them an ideal choice for a wide range of industrial and aerospace applications.

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