Re: punch die question

Stan,

Roper-Whitney uses a standard clearance of .006" on their dies for
use up to 16ga steel. The clearance is in the die, make the punch on
size.

Since .017" aluminum is getting fairly thin I'd guess a lesser
clearance might be called for. Might need some trials to determine
what's best.

Doug

--- In CAD_CAM_EDM_DRO@y..., stan mcdonald <SMCDONAL@K...> wrote:
> 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?
> Thanks
> Stan