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Shop press punching thick steel.
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Previously:
https://www.homemadetools.net/forum/...677#post225808
https://www.homemadetools.net/forum/...267#post204095
https://www.homemadetools.net/forum/...048#post199118
https://www.homemadetools.net/forum/...950#post160320
https://www.homemadetools.net/forum/...172#post191775
How much pressure to make the punch?
Ralph here is a chart for punching holes in mild steelQuote:
Originally Posted by Ralphxyz
https://www.americanmachinetools.com...punch_hole.htm
It is never recommended to punch a hole smaller in diameter than the thickness of the steel.
However, I used to regularly punch 3/4" holes in 1" plate by heating it above 600°f in an oven prior to punching
HI:
The pressure is the circumference x the thickness x the sheer strength of steel, so guessing at the sizes:
(1" dia x Pi = 3.14 ) x 1/2" thick x 30K psi for steel = 24 tons
Iron workers have very generous punch / die clearance which will drop the tonnage required.
Carl.