Drill America 5/16" Cobalt Drill Bit (12 pack) DWDCO
Cobalt drill bits for harder metals with round shanks and gold oxide surface. Customers note durability and sharpness, including use on galvanized steel and aluminum parts
Highlights
- cobalt for hard metals
- gold oxide coating
- aerospace standard 907
Pros
- cobalt steel for harder metals
- round shanks compatible with various toolholding systems
- thin gold oxide surface treatment
- effective chip evacuation when run counterclockwise
- manufactured to aerospace standard 907
Cons
- mixed opinions on size accuracy
- some notes on geometry perception
Best For
Features
- Cobalt alloy increases performance when cutting harder metals like stainless steel or nickel alloys
- Gold oxide coating is a thinner surface treatment similar in performance to uncoated tools
- Round shanks allow use with a wide variety of toolholding systems
- Right-hand cut spiral flutes evacuate chips up and out of the cut to reduce clogging
- Manufactured to National Aerospace standard 907
