[Harp-L] Arbor press for rivets?

[Wilbur Euler]

I agree.

Sent from my iPad

> On Sep 26, 2018, at 16:07, Vern <jevern at xxxxx> wrote:
> 
> Admittedly nit-picking…
> 
> Rivets and their holes in the plate are about .040” in dia.   Thus, a 1/16” punch (.0625”) is much too fat. You want a punch that is as fat as possible for strength but will pass through the hole without damaging it.  
> 
> That is why I suggested .035” or the size of a #64 drill shank.
> 
> To avoid pin buckling, it should be as short as possible…the .040” thickness of the plate is all the length that you need.
> 
> Buckling load is inversely proportional to column length squared.  According to Euler’s famous formula, halving the length gives four times the load capability of the punch pin.  For more than you want to know about buckling, see https://en.wikipedia.org/wiki/Buckling <https://en.wikipedia.org/wiki/Buckling>.
> 
> Vern
> 
>>> On Sep 25, 2018, at 3:59 PM, Joseph Leone <3N037 at xxxxx> wrote:
>>> 
>>> ……..You would need a pin about 1/16th.” in dia with a spire point. ……..