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Rounded Bolt Hobbing Holder

by richard_j_m Mar 29, 2013
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What size tap is that?

That's an M5 tap. I found the best way to get it to work was to push the bolt at the tap from the side with the wood clamped (or better bolted) at a pivot point on one end.

To create the groove I ran it on the corner of a stone on a bench grinder.