So I have a part made of 0-1. There is a through hole of .516 and and counter bore of .770. I have a HSS drill that's 33/64 but it seems that the o-1 is just destroying it? Is the o-1 just too hard or am I not drilling it coreectly with the mills speed? I'm not quite sure what to do about the .770 counter bore since I don't have a drill that size and don't think they make them that size. Currently I used a .5 carbide drill that uses carbide inserts and plan on EDMing it that last .016. I might be able to use a .75 carbide endmill to get the counterbore close to size then edm the rest of it out. All this would work but just seems very ineffient. Any ideas on what would be a better plan? I guess I could just make an electrode that does both too.