"Charles A. Sherwood" wrote in message
...

That's right Robin. 20% total clearance for MS on an ironworker is what
should

So, as I understand it. The punch determines the hole size and the die
is made a little bigger for clearance?

Just to be sure lets do an example:
If the punch is 0.375 and the die is 0.400.
Will it punch a .375 hole?
thanks
chuck

The punch determines the hole, the die determines the slug. Which is used
depends on if you're blanking or piercing.

Regards,

Robin