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On 1 Sep 97, WALTEE wrote:
> If you look at a cross section of a forged part, the "grain" of the
> metal follows the casting shape, whereas a billet piece has the
> grain extending straight through, where the weakest point will be
> where the grain extends to the edge of the shape, rather than
> following it.
For the record, let's point out that the word "casting" above is a
typo. There are three ways to make a crank. A forging is best,
turned from a billet is 2nd and a casting is by far the worst. The
stock crank is a forging; don't even consider either of the other two
options.
Jim
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Melissa Kepner Jim Adney
Laura Kepner-Adney
jadney@vwtype3.org
Madison, Wisconsin
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