Most times when I turn, I leave a little extra on each end so I start drilling with a short bit in order to keep as straight as possible, then I can cut off the extra so the blank that I am now drilling is much shorter so less chance of screwing up the thru hole by going off center. capece?
Also I do it on the lathe and since it is round, I can allow the blank to spin a little as I drill, if it was square I think I'd get splinters doing that
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