Well, after all of the trouble I've had getting an endmill holder for my 3/64" EM, I went back to the drawing board. Since I can't seem to drill a hole that is centered on the lathe, or at least not centered enough for this, I decided to drill the hole first, then put that end on the live center and turn the outside down to fit in a 3/8" holder. Then I took a 1/4" holder that I tried to make and bored it out to 3/8" and put the two together. I'll have to pick up another setscrew tomorrow, but this looks like it'll work. I was able to rotate the bushing to get the lowest reading. I kind of wonder if I could drill two holes off center by the same amount and put one inside the other so they would offset.

Anyway, my other attempt gave me about 0.005" plus maybe another half of runout. This one still has right at 0.003", but that's better than I had before, and tons better than the crap I got from A2Z. I hope I have time to try this out tomorrow evening.



Dave