I was going to buy some from Drill Bit City:
http://drillcity.stores.yahoo.net/One thing thought, the carbide bits are vary birttle and I found it was not possible to use them with a hand held tool like a Dremel. Not even sure you can use a low quality drill press. The quill runout needs to be fairly good and the down feed needs to be very sensitive or you will snap them. You also need to turn them very fast, they like speeds around 30,000RPM -- some PC drillers use 100,000 RPM. I have had success at 5000 RPM on my CNC Bridgeport mill. I am sure I will snap a few before I get he feed rate dialed in. I have plans for a high speed spindle but not had time to work on it.
Craig
I will be drilling with my CNC bridgeport
--- In Homebrew_PCBs@yahoogroups.com, Cristian <bip@...> wrote:
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> > I eventually bought a sharpening machine that had diamond wheels,
> > drill bushings and a microscope.
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> Let me know where to buy such tool, Tom, please.
> Cristian
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