Bridge Pins, was Bridge Capping Materials: Ebony?

[Steve Fujan]

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The stiffnesses of Titanium and SS are not very dependent on the particular
alloys chosen.

Good point about assumptions Ron.  I guess one assumption is that wear of
the bridge pins is bad.  Hmm... could it actually be good, sort of like
seating the wire into the pin?

Time for bed in Tulsa, OK.  g'night y'all.

Steve


On 12/2/05, Ron Nossaman <rnossaman@cox.net> wrote:
>
>
> > Hardened stainless steel gets my vote.  Not only is it harder (hence
> > more wear resistant), it is also considerably stiffer than titanium.
>
> Which alloys? Both titanium and SS.
>
>
> > The more flexible titanium would bend more right where the pin enters
> > the wood causing higher stress right where you don't want it.  The
> > stainless steel would spread the force over greater depth into the
> bridge.
> >
> > Plus hardened stainless in these small diameters should be relatively
> > easy to make, hence cheaper, er..  less expensive than titanium.
> >
> > Steve Fujan (BSME, MSME, PE)
>
> Right. Now you just have to decide what the problem is, whether or
> not the current mild steel bridge pins are actually the problem, how
> this problem manifests, and whether it might or might not be the
> capping material that is causing whatever the problem might prove to
> be instead. So, exactly what problem will harder bridge pins correct
> that denser, harder, and less moisture reactive capping material
> won't? I see a number of assumptions being made here that need
> clarification. Not from just you, Steve, but in general.
>
> Ron N
> _______________________________________________
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>

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