Drill America D/ACO cobalt heavy-duty drill bit set (12-pack)
Cobalt steel drill bits designed for harder metals with gold oxide surface and round shanks. They evacuate chips to reduce clogging during right-hand cut drilling. Manufactured to aerospace standard 907. Customer notes: high quality, sharp cuts, durable and long-lasting
Highlights
- cobalt alloy for hardened metals
- right-hand cut chip evacuation
- aerospace standard 907 compliance
Pros
- cobalt steel for harder metals
- gold oxide surface treatment
- round shanks for versatile toolholding
- efficient chip evacuation on right-hand cuts
- manufactured to national aerospace standard 907
Cons
- angle feedback noted as mixed by customers
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.
