Drill America D/AMMCO series heavy duty jobber length drill bit. Manufactured to National Aerospace standard 907. Made of heat resistant cobalt steel, it displays higher red hardness which permits speeds up to 30 percent greater than High-Speed Steel drills and is especially effective in drilling tough, high tensile strength materials like PH stainless steel, inconel and titanium. The 135 degree split point is self-centering and reduces thrust. Sizes smaller than 1/16 have the 118° standard point.
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; performance is similar to uncoated tools
Round shanks allow use with a wide variety of toolholding systems
When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
Manufactured to National Aerospace standard 907