For drilling this grade of copper, you need to grind a negative rake on your twist drill to prevent this from happening.
Just a tip from an old toolmaker... |
Good point, Dan. Or rake, or what ever.
I've had luck with 135 deg drills with copper before. Copper is one of those materials that seems easy to machine, but it often turns into a R&D project when you start dealing with that gum.
'Rekd teh Eagles may soar, but weasels don't get sucked into jet engines!
