On Feb 11, 2006, at 9:05 AM, engnut2004 wrote:
Hi, all,Carbide drills are brittle and are not as sharp as HSS. Carbide will not sharpen as sharp. Just the nature of carbide. You are wasting your money because they cost more than HSS. AS a machinist I would never use one for any thing with a Rockwell of less than 56 and never hand drill with one. They should be run at high speed.