I modified an old CNC training machine to work with DeskCNC and have been happily engraving PCB's for a while now, however the only bit that I have found that works really well is a M99 carbide spade bit from http://www.northbaytechnical.com/ . These bits work great but are a bit spendy at about US $15.00 each. Does anyone have suggestions/different suppliers etc they can recommend? I don't think self sharpening works too well for me as the bits are just too darn small and brittle. BTW the size of track you can get down to with these bits seems to be 8 thou or smaller, pretty impressive I think.
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Engraving Bits - alternate sources or suggestions?
2003-09-01 by aussiedude36