[admin] RE: Kawai heavy action

[Isaac OLEG]

Hello Fred,

  yes , that is , I guess you probably can apply the water from inside
the leather , but from experience with grand backcheks, a simple drop
of water will moist a large part of the leather, if you are too near
of the glue joint you can possibly have problem with it. Nowadays the
stretch factor is important enough, the glue also stretch a tad, I
have find that the guing is more controlable with this method, and the
end result very tight.

Never done that for grand rollers, please let me know how it turns. I
said pure water to avoid eventual marks, and deposit, I don't believe
that is so important but...

What I suspect is that you will probably have to change the leather,
when moisted you will discover that it have been driven too soft with
the rolling motion experienced, and that the repair  risk is a
premature wear of the leather don't you think so ?

That should be interesting to test the trick on Ecsaine also, if the
process work with some fiber propreties, it possibly work as well on
synthetics.

Have beeen shown how to unglue a set of rollers in more or less 10
minutes with a brass punch and an adequate support, from the side, the
roller pop out clean and fast (may be depending of the brand, glue
used ...)

Thanks for keeping posted.

Isaac OLEG


-----Message d'origine-----
De : Fred Sturm [mailto:fssturm@unm.edu]
Envoye : vendredi 26 mars 2004 18:39
A : oleg-i@noos.fr; College and University Technicians
Objet : RE: Kawai heavy action


Isaac,
	Am I right in thinking you mean apply the water to the knuckle
leather
after you have cut it loose on one side, and before stretching and
gluing?
A drop of water close to the remaining glue joint? The water making
the
leather more pliant (easier to stretch), so you don't have to stretch
it as
tight as you want it to be in the end, as after the water dries, the
leather will tighten itself to a certain extent?
	This piano has Japanese hammers, not Renner.
Thanks,
Fred Sturm
University of New Mexico

--On Tuesday, March 23, 2004 9:43 AM +0100 Isaac OLEG <oleg-i@noos.fr>
wrote:

> Hi,
>
> While you will be at it, applying a drop of pure distilled water on
> the leather (if it is leather ) of the knuckle, can help you to
tense
> it tight while gluing. The  tension shows up when drying , and it is
> better not to overtight the leather first then (it is easy because
the
> water makes it more soft).
>
> Then if you do that with little plastic press clamps and hot glue
you
> can finish with a good job, assuming the underside is not too flat.
>
> Most  of the KG series in France have Renner hammers, is yours ? -
> i've always been told that these hammers wher fitted by the
importer,
> they used very heavy hammers, some pianos play like trucks, but at
> these times pianists seem to appreciate that (because of the
teatchers
> instructions to gain muscles !).
>
> Isaac OLEG
>


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