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? Jim Busby On 1/30/2011 9:39 PM, Dr. Henry Nicolaides wrote: > I'll try slowing down to aproximate that speed and drill a few test > holes...perhaps 1250 rpm was too fast. It's been awhile since I drilled > delignit. I think the last one I drilled I made two passes...first with > a smaller bit and half way into the block and then with the normal bit. > BTW, do you use a brad point or sprial bit? Go back to two passes. Drill the first hole, *all the way through*, something like 0.015"-0.02" smaller than your finish size. Then do the second pass with the finish size - regular jobbers bit. Throw away the high helix. You'll get a more uniform result with less trouble than anything else you've ever tried. Ron N
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