Drying pinblock before stringing

[gordon stelter]

Huh? It is my understanding that, for compression set
to occur, it must have something to compress AGAINST.
Hence, a pinblock with NO PINS IN IT, when dried, will
NOT develop compression set in the wood fibers around
the freshly drilled holes. Furthermore, while I will
concede that a hole drilled in a block of homogeneous
wood MIGHT get bigger as the block is soaked (probably
depends upon species and cut, to some degree) I also
acceept Ken Jankura's statement that a constrained
piece such as a glued up and laminated pinblock will
NOT expand outward exclusively, and some force of
expansion will therefore be directed INWARD towards
the pin holes, making them smaller.
     Which is EXACTLY why compression set opccurs in
pinblocks over time! Sheesh! I had some trouble
learning to shave in a mirror when I was 14, but this
is EASY to conceptualize! Doncha think?
    Lovingly,
    Thump

P.S. It does not always take years. Around here, where
the humidity fluctuates wildy, it may take much less.


--- Ken Jankura <kenrpt@earthlink.net> wrote:
> Which is probably why it usually takes years to be
> further damaged enough by
> EMC changes and pin forces to be noticed?
> 
> ----- Original Message -----
> From: "Ron Nossaman" <RNossaman@cox.net>
> To: "Pianotech" <pianotech@ptg.org>
> Sent: Friday, February 28, 2003 10:01 AM
> Subject: Re: Drying pinblock before stringing
> 
> 
> >
> > >  Drying the block down too much would not be
> good as it may
> > >start the process of compression set around the
> pin faster than it will
> > >occur normally.
> >
> > Hi Ken,
> > Just installing a pin in any block compresses the
> wood far beyond it's
> > fiber stress proportional limit. In other words,
> the hole won't spring
> back
> > to it's original diameter if the pin is removed
> immediately after driving.
> >
> > Ron N
> >
> > _______________________________________________
> > pianotech list info:
> https://www.moypiano.com/resources/#archives
> >
> 
> _______________________________________________
> pianotech list info:
https://www.moypiano.com/resources/#archives


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