CA gluing Grand pinblocks

[gordon stelter]

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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