On 1/31/2011 11:16 AM, Jim Busby wrote: > All, > > I've done it this way for many years now. (Thanks Ron) This is really > THE only way that works 100% of the time w/o compromising the hole in > any way. It is so easy. It's so brilliant, yet few seem to do it. I > guess two passes is too much work? The almost universal concern I've heard is "How can I possibly exactly center the hole on the second pass?" Fact is, you'd have to do something borderline insane to prevent it from centering. It's nearly unavoidable. I stole the idea from the machinists, who have been doing it for hundreds of years to pretty good effect. Besides being by far the most accurate method I've ever found, it can be done with the least sophisticated tooling and methods, and is highly idiot resistant to boot. So it meets all the standard requirements for use in my shop. Ron N
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