Some of you might recall I was having trouble drilling out 18 gauge sheet metal a while ago. I’ve gotten better at it but still have a lot of trouble. I bought zero rake drill bits pacifically designed for thin sheet metal and a precision collet. That takes care of most of what I do but copper and stainless steel still elude me.
I’ve tried boring it with a under sized endmill, both 2 and 4 flute but heat builds up very fast, as in I can’t touch the part for a minute afterwards without burning myself, or my work holding fails.
Normal drills will stall the nomad and I can’t seem to find speeds and feeds that work for copper at all. It sort of work hardens on me.
I realize drilling is not a great idea on this system but I’d appreciate options.