CA gluing Grand pinblocks

[Joe And Penny Goss]

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
>
>