October 17, 201015 yr On Monday when I get back to my laptop, i'll try to take a video today also. I was forging anchors, one single piece and a two piece both single fluke.
October 17, 201015 yr Stewart, I agree 100%, like any punched hole done hot it's a touch sloppy. I would make my life even easier, hot punch the hole undersize then drill to the right size you'd take less time as you are drilling out less material, like a pilot hole.
October 18, 201015 yr Hot punch slightly undersized and drift from both sides as the metal cools to get a more accurate dimension. If you upset the drift slightly you can make up for the size change due to heat. Mark Aspery demo'd that, was pretty impressive--think he did three hammer blows for a half inch drift.
October 18, 201015 yr Hot punch slightly undersized and drift from both sides as the metal cools to get a more accurate dimension. If you upset the drift slightly you can make up for the size change due to heat. Mark Aspery demo'd that, was pretty impressive--think he did three hammer blows for a half inch drift. I used to barrel drift holes out to size and could usually get 1-1/2" hole to size withing .005 +or-. Shrinkage is very close to .010 per inch from 1500F, so for a 1-1/2" hole I would make my barrel drift .015" big.
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