Drill America 5/32 Cobalt Heavy Duty Drill Bit Pack

Manufactured to 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 tools 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. 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 to reduce clogging. The 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.

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