On Sat, 13 Sep 1997 11:56:48 -0700 CHUCK NICODEMUS <SEALMSTR(at)ICCOM.COM>
writes:
>Jarrid, it is my summation that by hitting it with a hammer you my
>hear
>the different tones emmited by the "cast" v "forged?
>but then you would have to have one each to decypher the difference??
>
>chuck
This is the common way "as I have been tought" to differentiate between
common cast cranks, and the superior forged pieces.
The tonal quality and the length of the ring is a dead giveaway.
To the person/persons performing the ring test....
Be certain to compare the ring of the SV crank against another
known forged crank "IE an EN-16 1600cc 3 main crank".
I performed this test, along with other peoples, long ago, and the
differences
are un-mistakable. The tonal quality of the SV cranks ring was slightly
superior to nodular iron cranks, and all the cortina type formula ford
cranks I rung out, but in comparison with an 8740 sb chevy crank or
the 3 main alpine, night and day.
Once again, could these cranks be cast steel?
Tom Wiencek, metalurgist et al?
Cheers, and of course, keep me informed.
Jarrid
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