CA gluing Grand pinblocks

[Baldwin Yamaha Piano Centre]

Hi Gordon,
                   If I had to go to all that trouble, I would opt for re 
pinning.  On really old pianos, there is usually a gap on the rear side of 
the pin.
But this was a 1972 Kawai, and the bushings were firm and tight.   They 
were sure glued to the plate, right along with all the belly felt.
Regards Roger


At 03:25 PM 7/27/02 -0700, you wrote:
>How about drilling a tiny hole in the tuning pin
>bushing on the non-compressed side, so that CA can get
>to the bock more effectively?
>--- Baldwin Yamaha Piano Centre
><baldwin@mta-01.sk.sympatico.ca> wrote:
> >
> >
> > Hi Joe,
> >               We cut up two blocks to examine the
> > results. Both pianos had
> > no plate bushings.
> > The thin CA had wicked down the pin holes to a depth
> > of about 1/4" to 3/8".
> > After cutting through the holes we run the side of
> > the block through the
> > disc sander, the glue had wicked into the end grain
> > by about 1.5mm about
> > half that for the cross grain, as far as we could
> > tell with a bright light
> > and a magnifying glass.
> >
> > As a test we put some 2.0 pins back in the removed
> > block, just tapping them
> > in to just grip. Then we applied CA from the bottom
> > so there was a little
> > pool around the edge of the pin, and let it set up.
> > Next day we cut the
> > block and sanded. It had penetrated about 1/2" down
> > the pin and seemed to
> > have wicked about the same down the drain.
> >
> > Not too scientific, but good enough to convince me
> > that bottom application
> > is better.
> >
> > We have a Kawai KG2 in the shop at the moment, that
> > looks like some one
> > tried to treat the block with a few bottles, what a
> > mess.  If there was any
> > improvement in tuning stability, I would be
> > surprised. None of the CA
> > reached the block. If there was any increase in
> > holding power it would have
> > come from gluing the plate bushing to the plate and
> > the pin to the
> > bushing.  Needless to say we are installing a new
> > block.
> >
> > A thought as I type, is to treat the next candidate
> > from both the top and
> > the bottom.  I think the torque may come up to
> > better than just
> > acceptable.maybe even the 100lb range.  It will be
> > worth trying.
> >
> > Now Back to my cool beer.
> >
> > Regards Roger
> >
> >
>
>
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Roger