pin block/flange fit

[Horace Greeley]

Vince and Dave,

This method works on just about every plate-gap related problem.

I've not used this particular Hysol product, but do use a thicker one
(sorry, don't remember the number right now) for final fitting of
a new block.

Thanks.

Horace


>On Mon, 03 Mar 1997 18:05:09 -0700 Vince Mrykalo
><mrykalov@BYUGATE.byu.edu> writes:
>>I was called to service a piano that has an instability
>>problem.  It is a Hoernung & Mueller (Danish made) 7'
>>grand that has plate bushings and the pin block was
>>not fit properly to the plate flange at the factory (so I
>>assume).
>Vince
>We  invert the piano on blankets and backfill the crevice between the pin
>block and plate flange with a thin Hysol #1051 epoxy, made specifically
>for the foundry industry.  This has really solved these tuning
>instability problems for us.  I've done it on Hyundais (every piano they
>make needs this), Young Changs (ditto), and even Yamahas.  It has ALWAYS
>been beneficial and apart from the task of inverting the piano, removing
>the lid and hinges, it is very simple.  We never do any letting down of
>the tension either.  Apply it into the crack with a paper clip or piano
>wire, using a mirror and a strong light to see what you're doing.  I
>prefer this to shims any day and the fit is much more complete.
>You can buy the Hysol from a distributor here in Somerville, MA,  Malcolm
>Stevens.  I can get more info today at my shop.  It is a two part epoxy
>and is rather cheap in comparison to some types and it is made for use
>next to cast iron.
>David Sanderson
>Littleton, MA
>Pianobiz@Juno.com




Horace Greeley			hgreeley@leland.stanford.edu

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