Hi. Thank you for responding. I understand - but the hole is already 45/64" (or miniscule amount greater than 45/64) and the new45/64 drill bit just drops through the hole.

The need is to create a tapered hole for a tapered tap and bushing to thread deeper into the hole.


[*]Is that advisable and is there a tapered bit with the point of the bit at 45/64 gradually getting larger in diameter up the drill bit shank as the bit is drilled deeper into the block.

Yes, caution is key when I do this.

Last edited by tom moore; 05/29/2020 11:56 AM.

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