3018A2- part number for tapered reamer at Mc Master-Carr- This is the approximate tapered hole I need in the steel block. To account for wall thickness, the diameter at small end of cone female die would likely be 1/2" position and up the taper from that point for about two inches. I don't know if there is some kind of plunge milling cutter that would do it. Shade tree would be to use two hunks of mild steel with this reamer in a brace and the "sandwich" in a vise. Ream, tighten vise;ream, tighten vise; and on and on. Then weld the two pieces together and finish ream by hand with same reamer. If there is a milling cutter that would do it, it would be less tedious- though such thinking is outside the tradition of smiths' " find a means with stuff on hand." I am still open to more ideas. Thanks,jet
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