"Andre Majorel" wrote in message
...
Thanks for the hint, Ned. How do you know what press force is
needed for a given job ? Specifically, punching holes about
1 cm² in 1 mm steel or 3 mm aluminium.

--
André Majorel URL:http://www.teaser.fr/~amajorel/
"Marque nouvelle. Dans le stock. Les navires de FL, les
Etats-Unis. Service de client exceptionnel garanti."

You can reduce the amount of force by grinding an angle on the punch.