On Jul 17, 9:07*pm, wrote:
On Sun, 17 Jul 2011 05:33:47 -0700 (PDT), Jim Wilkins
...
The bottom line is you have no good way to predict what's happening
and should measure the forces.

Even some sort of indirect method would be useful to achieve
consistency. Stick a lump of rubber in the press and measure its
distortion?

Michael Koblic,

This is a good geometry for a homebrew mechanical force gauge:
http://www.mhforce.com/RingForceGaugesMain.htm

I don't have any data on dimensions or a suitable source of tubing.

jsw