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ok. I guess if I can get my hands on a stock one that someone broke or was bent I could take it to work and have the lab guys look it over to tell me what I would be dealing with. Thanks again

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Find a old/bent shaft and cut it into about 3 pieces,
check the material on one then have the lab determine
what the rockwell C is then figure what it might need
to be (rockwell C) then after hardening do a torsional
test on it.... otherwise your just guessing and
even then you still dont know if it can take the
shock