Re: [CAD_CAM_EDM_DRO] punch die question

Standard rule of thumb is 5% of material thickness per side, so in this case
the clearance would be .00085 per side. You are correct, if you are saving
the blank the die is made to size and the clearance is in the punch. If you
need the hole the correct size the clearance is on the die.

> Hi list. I need to MFG a bunch of AL discs without holes in them from
> some .017 thick AL I have a 3 ton punch press. I need the discs 2-1/8"
> dia and to be flat when done. My understanding is that the female bunch
> needs to be bored out to 2-1/8 DIA but how do I calculate the DIA of the
> male punch?