Hexagonal Shaft

[Joe And Penny Goss]

Ah me, I ment 7/32"    finger error and brain lapse sorry.
Joe Goss
imatunr@srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "James Ellis" <claviers@nxs.net>
To: <caut@ptg.org>
Sent: Sunday, November 16, 2003 6:52 PM
Subject: Hexagonal Shaft


> On November 14, Joe Goss wrote that a 3/32 hex shaft is as strong as a 1/4
> round shaft (talking about hammer shanks).  Today, I asked how he arrived
> at that conclusion.  Today Joe answered.  Joe, in your answer, you
compared
> a 1/4 round shank to a 1/4 hex shank.  That's obvious.  But that's not
what
> you said.  You originally said a 3/32 hex shank is as string as a 1/4
round
> shank.  3/32 = 0.09375.  That's less than 1/8 inch.  I never saw any
hammer
> shank that small, even in an antique piano, but that's what you wrote. I
> went back and checked your statement twice.  So, I assune you meant 3/16,
> not 3/32, but that won't work either.  I laid out a few sample Renner
> shanks, but they aren't hex.  They are octagonal, and they are certainly
> much larger than any 3/32 inch, and definitely larger than any 3/16 inch
> for that matter, no matter where you measure them.
>
> Since this issue has been raised, I'm going to go back and make a few
> stress/strain measurements on some different types of shanks, and just see
> which bends more than what.  I'll get back with the results in a few days.
>
> Let's all try to avoid making wild guesses.  OK?
>
> Sincerely, Jim Ellis
>
>
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