Tuning Pin Length?

[gordon stelter]

Most, high quality uprights I have smashed up have the
pinblock glued to a very solid beam. Some cheaper ones
have had a hollowed cavity behind the block. But I've
found many open-faced blocks on Victorian pianos in
superb condition, even here in the South.
--- Clyde Hollinger <cedel@supernet.com> wrote:
> Joe,
> 
> Well, to get another handle on the statistics here,
> how many *original*
> pinblocks have you seen that were *not* drilled all
> the way through?  I assume
> we're talking about grand pianos.  If 99% of the
> pinblocks from the
> manufacturers are drilled all the way through, then
> this statistic doesn't
> really tell us anything.
> 
> Now to follow a related rabbit trail a little how
> many *vertical* piano
> pinblocks are drilled all the way through?  Or, if
> they are, maybe I should ask,
> is there ever open space behind a vertical pinblock,
> or is it screwed/glued to a
> solid panel?  I've never rebuilt a piano, so I don't
> get to examine the "guts"
> the way some of you do, but I've run into a
> situation where I tried to tap some
> tuning pins in a vertical a little deeper, and it
> definitely felt like they hit
> bottom when there was still room at the coil.
> 
> If vertical pianos in general are *not* drilled all
> the way through, then
> following Joe's logic we should have a lot fewer
> failing pinblocks on verticals
> than on drilled-through grands.  I'm not sure that's
> the case.  I hope to learn
> something today.  <G>
> 
> BTW, here in southeast Pennsylvania we are having a
> prolonged rainy spell.  Our
> rain gauge shows only an inch so far, but we're
> hopeful for more today.
> 
> Regards,
> Clyde Hollinger
> 
> Joseph Garrett wrote:
> 
> > As I do not drill
> > all the way through my pinblocks, but simply
> "dimple" them, like we do for
> > upright hammers. This dimple is to relieve the
> hydrolic pressure of the Pin
> > Driving fluid.  As I firmly believe that a
> completely sealed pinblock will
> > last longer, this
> > is how I do it. (99% of the pinblocks I've had to
> replace were drilled all
> > the way through.)
> 


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