Carbide PCB drills are available from McMaster Carr, but they are not exactly cheap. I found some at a surplus store, in the past cheap, but they are not in business anymore. If you have a PCB fab nearby you might be able to buy some used bits that they may just throw away. Bob [Non-text portions of this message have been removed]
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Re: [Homebrew_PCBs] Drill Bits
2011-05-13 by Bob Butcher