On Mon, 21 May 2012 12:26:00 -0700, "Bob La Londe"
wrote:

Yes. I don't know how to drill gun barrels either. LOL.

Gun barrels are drilled with single-lip bits that self-center by
bearing against the work with the side that's opposite the cutting
lip. In volume gun drilling, both the work and the bit rotate.

I can't figure how you're going to get straight holes in your
application, but I don't see how gun drills would help. They're a
technique unto themselves, and kind of tricky.

--
Ed Huntress





"David Lesher" wrote in message
...

Is this similar to the issue of drilling gun barrels?
Could any of those techniques help?
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