Quote:
Originally Posted by MichaelBick
I really like thunderhex for this, just because it has the pre-bored hole. This keeps the drill relatively concentric to the axle and helps with chip clearing (the two biggest issues you have to face with small diameter drills).
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The bummer is this hole isn't always concentric.
We generally bore encoder holes for this reason.
If your tailstock is reasonable concentric just boring with a 1/4" end mill is adequate.