Drill America cobalt heavy duty drill bit set (6-pack) D/ACO
Cobalt steel drill bits designed for harder metals, with a thinner gold oxide surface. Customers praise quality, performance, and durability, noting sharpness comparable to carbide-like bits
Highlights
- cobalt steel for harder metals
- round shank versatility
- aerospace-standard manufacturing
Pros
- cobalt steel for cutting harder metals
- round shanks for broad toolholding compatibility
- thin gold oxide surface treatment
- good durability and sharpness
- includes multiple bits in a pack
Cons
- mixed feedback on angle aspect
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.
