Drill America D/ACO Series Cobalt Steel Premium Quality Reduced-Shank Drill Bit, Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degrees Split Point, 33/64" Size (Pack of 1)
by Drill America
- 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
