jarrid_gross(at)juno.com wrote:
>
> On Fri, 12 Sep 1997 22:57:33 -0700 joe kleifges <hardchrome(at)netvalue.net>
> writes:
>
> >there is a parting line on the cranks, but both forgings and castings
> >have p/l's. both are a form of molding!!!
> >there is not a rough grain apparent in the crank, hinting towards
> >forging.
> >machined, but un "finished" areas are much brighter than i would
> >expect
> >in cast iron
> >the p/l has indents in it, where flashing was either cracked off after
>
> Some time back there was extensive conversation on whether the SV
> cranks were cast or forged.
>
> One person, who claimed to be knowledgable in this field left us with
> the following synopsis.
>
> Cast cranks will have a narrrow parting line, and the forged crank will
> have a wider parting line.
>
> The SV crank is kind of strange, in that it seems to look like
> steel, but be cast anyway.
>
> One of my personal theories is that is may be cast steel.
>
> Could this be possible?
>
> Anyhow, get the testing over with and hit the crank with the hammer.
> That should remove all doubts.
>
> Jarrid Gross
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
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