Drill America D/ACO cobalt heavy duty drill bit set (12)
Cobalt steel drill bits designed for harder metals with a gold oxide finish and round shanks for versatile toolholding. Customers note high quality, sharp cuts, and durability, with some comparing favorably to other cobalt bits
Highlights
- cobalt alloy for harder metals
- round shank versatility
- standard-compliant manufacturing
Pros
- cobalt steel composition for hard metals
- gold oxide finish with thinner oxide surface
- round shanks for versatile toolholding
- efficient chip evacuation in backward-cut rotation
- manufactured to National Aerospace standard 907
Cons
- angle aspect receives mixed feedback
Best For
Features
- Cobalt steel tooling for improved performance on harder metals like stainless steel and nickel alloys
- Gold oxide coating provides a thinner surface treatment with performance similar to uncoated tools
- Round shank design compatible with a wide range of toolholding systems
- Counterclockwise (right-hand cut) operation with spiral flutes for chip evacuation
