Drill America cobalt heavy-duty drill bit set (12 pcs) D/ACO
Cobalt steel drill bits designed for harder metals, with gold oxide surface and round shanks. customers note sharpness and durability, comparable to carbide bits
Highlights
- cobalt alloy for harder metals
- gold oxide surface treatment
- round shank versatility
Pros
- cobalt steel composition for hard metals
- gold oxide surface for corrosion resistance
- round shanks compatible with various toolholding systems
- negative-angle evacuation improves chip clearance
- manufactured to aerospace standard 907
Cons
- angle performance feedback described as mixed
Best For
Features
- 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.
