Cobalt Drill Bits (Pack of 12), D/ACO Series

The Cobalt Steel Drill Bits, Engineered for Superior Performance

Manufactured to the National Aerospace Standard 907, these cobalt steel drill bits are designed to deliver exceptional performance. Crafted with heat-resistant cobalt, they exhibit a higher red hardness that allows for speeds up to 30 percent greater than those of High-Speed Steel drills. These cobalt steel tools are particularly effective in drilling tough, high-tensile-strength materials such as PH stainless steel, Inconel, and titanium.

Compared to high-speed steel, cobalt steel tools offer improved performance when cutting harder metals, including stainless steel and nickel alloys. The addition of more cobalt to the alloy composition is the key to this enhanced capability.

The drill bits feature a gold oxide surface treatment, which is a thinner oxide coating than the more commonly used black oxide. This surface treatment helps to identify the cobalt steel composition of the tools, while their performance remains comparable to that of uncoated tools.

The round shanks of these drill bits allow for use with a wide variety of toolholding systems, providing versatility and adaptability in various machining applications.

An important design aspect of these cobalt steel drill bits is their spiral fluted configuration. When run in a counterclockwise direction (right-hand cut), the spiral flutes effectively evacuate chips up and out of the cut, reducing the risk of clogging and ensuring a smoother, more efficient drilling process.

In summary, the Cobalt Steel Drill Bits, Manufactured to National Aerospace Standard 907, are engineered for superior performance in drilling tough, high-tensile-strength materials. Their heat-resistant cobalt composition, higher red hardness, and spiral flute design make them a preferred choice for demanding machining applications, particularly in the aerospace and industrial sectors.

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