In article et,
"Lloyd E. Sponenburgh" wrote:

If there is significant "play" in the joint held by the pin, and the actions
on the joint are forceful and rapid, definite "work hardening" of a pin
could occur. In that case, it might be a good idea to use a non-ferrous pin
that is less likely to harden than might some steels.

If there is any detectable play in the shear pin joint it is better to
ream out to a bigger size so the joint is tight.

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