Everett vertical pinblock separation

[Jon Page]

I would like to point out something in a situation similar to this.
Draw the crack as closed as possible with clamps before drilling.
This will decrease the amount of wood chips falling into the crack
but more importantly it will align the drill hole better.

With the crack separated and the hole drilled, the portions of the
drill hole on either side of the crack will not be in line when drawn up with 
the bolts. This alone will restrict the gap from closing.

This was sound advice given by John McDonald, RPT
proir to my first attempt at this too many years ago.

Jon Page
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 11:13 AM 12/14/97 -0500, you wrote:
>Regarding letting the tension down...
>I found a Kimball upright with the plate separating from the back.  I
>drilled through the
>plate screw holes all the way out the back, and put bolts and nuts to clamp
>it all together.  I didn't reduce tension further because the whole thing
>was over 100cts flat
>to begin with, probably because of the plate separation.  I did it carefully
>though, because of ADDING the new tension when tightening it up.    This
>isn't really a crack repair requiring adhesive, so I didn't add anything to
>the mix, just better 'clamps' than the original lag screws.
>
>Brad Smith, RPT
>Manchester, NH
>-----Original Message-----
>From: Maxpiano <Maxpiano@aol.com>
>To: pianotech@ptg.org <pianotech@ptg.org>
>Date: Saturday, December 13, 1997 11:30 PM
>Subject: Re: Everett vertical pinblock separation
>
>
>>In a message dated 97-12-13 01:17:44 EST, you write:
>>
>><< I think that you ought to
>> put this on the list of things to do in the future.  Easy fix....run glue
>>into
>> crack and tighten bolts, use clamps to help the bolts until glue has set,
>>etc. >>
>>
>>Jim - In your experience, it is possible to pull the crack together without
>>letting the tension down?  I have never tried it without  backing off the
>>tension and then haveing to go through several times over the whole piano
>>(pitch raising, tuning) to get it back.
>>
>>Bill Maxim
>>
>
>
>