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squiggles · 03-03-2011, 08:18 AM

You are supposed to sharpen drills different for drilling copper, can't remember the detail, it was 35 years ago in trade school when I learned it!

Less sharp cutting edge I think.

03-03-2011, 08:18 AM	#4432 (permalink)
squiggles EcoModding Apprentice Join Date: May 2009 Location: Australia Posts: 109 Thanks: 0 Thanked 2 Times in 2 Posts	You are supposed to sharpen drills different for drilling copper, can't remember the detail, it was 35 years ago in trade school when I learned it! Less sharp cutting edge I think.