On Nov 30, 10:07 am, Clark Magnuson wrote:
It seems to me that for a long pin, the calculation on the pin would be
bulk modulus, and the calculation on the hole would be Lame's formula.

The equilibrium between those two forces times the co efficient of
friction would give the force needed to drive in the pin.

The heat treat on the hole would make the math the same up to the point
that the hole permanently stretched. The hole when heat treated could
stretch larger and still spring back. The heat treat would then be a
good thing, if the forces are not so high that you can't get the pin in.

Whack the hole with a ball pein hammer on the exit side and let the
pin stretch it back.