CA gluing Grand pinblocks

[Baldwin Yamaha Piano Centre]

None as yet Joe, due to the brittleness of the CA, I think it would just 
pop off anyway.

I've tested the CA on some new pin block material with similar results.

If you are careful it can give great results.  Each time I drill a new 
block I always seem to get one or two pins with slightly lower torque then 
the rest of the block.   I'm quite comfortable using one or two drops of CA 
to bring them back in line with the rest of the block.  There has been no 
down side that I can see.

Regards Roger


At 05:03 PM 7/27/02 -0600, you wrote:
>Thanks roger,
>I take it that you have no plate adhesions as yet.
>  The information confirms what I have suspected. Only real tightening is
>done by making the pin deeper in the hole by adding the influence of the
>bushing gripping the pin.
>I never could visualize the CA penetrating the maple that far, but down the
>side of the pin, yes
>Joe Goss
>imatunr@srvinet.com
>www.mothergoosetools.com
>----- Original Message -----
>From: "Baldwin Yamaha Piano Centre" <baldwin@mta-01.sk.sympatico.ca>
>To: <pianotech@ptg.org>
>Sent: Saturday, July 27, 2002 3:01 PM
>Subject: Re: CA gluing Grand pinblocks
>
>
> >
> >
> > 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
> >
> >

Roger