[pianotech] Re: separated pin block

Farrell mfarrel2@tampabay.rr.com
Mon, 9 Sep 2002 07:20:39 -0400


Uh, yeah, of course that's the way I do it. That's why I was asking about drilling in from the back!

Seriously though, ah, yes, silly me - go in from the top of the posts/spacers - that will indeed make all super-solid - I guess the lid was in the way of my imagination! Thanks Roger.

Terry Farrell
  
----- Original Message ----- 
From: "jolly roger" <baldyam@sk.sympatico.ca>
To: <pianotech@ptg.org>
Sent: Sunday, September 08, 2002 10:23 PM
Subject: Re: separated pin block


> Hi Terry,
>               Drill straight down vertically, half the material coming from 
> the post, half from the spacer. About three quarters way down the depth of 
> the spacer.  Use PVC electrical tape to seal the bottom and sides of the 
> spacer.    The dowel will lock the spacers in position.   The epoxy will 
> gap fill, the space between the post and spacer.  Simple and 
> neat.   Remember to do the bottom spacers while you are at it, for a 
> complete rigid structure.   When rebuilding verticals it will make a big 
> difference to sustain.
> 
> We do the repair with the piano on it's back, so the drill is parallel to 
> the floor.   It's hard to dam the spacer to post gap, at the rear.
> 
> It's almost an exercise in futility, bolting every thing together, if the 
> spacers are loose. In most cases where there is block to back support 
> separation, the spacers are also loose, for all the time it takes just 
> dowel them.
> 
> I thought every one did this way.  <G>
> 
> Roger
> 
> At 08:42 AM 9/8/02 -0400, you wrote:
> >You are just absolutely too amazing! Tell me if I am picturing this right: 
> >You drill a 1/2" hole (horizontal to the ground and perpendicular to the 
> >piano back) along the vertical joint line on the back of the piano between 
> >the post and the spacer? And then epoxy the dowel in the hole?
> >
> >I'm sure that would indeed firm the back right up! This is a VERY good 
> >idea for when you have the separated back on those short pianos where the 
> >entire tenor tuning pin field covers much of the upper section of the 
> >plate and you just can't put a bolt or lag through a post.
> >
> >I have through bolted through a spacer that was unsecured. Believe me, the 
> >spacer moves, not the plate!
> >
> >Terry Farrell
> >
> >----- Original Message -----
> >From: "jolly roger" <baldyam@sk.sympatico.ca>
> >To: <pianotech@ptg.org>
> >Sent: Saturday, September 07, 2002 2:00 AM
> >Subject: Re: separated pin block
> >
> >
> > > At 09:53 PM 9/6/02 -0400, you wrote:
> > > >Sounds like a good way to make this repair real neat. I have bent a 
> > couple
> > > >BIG "C" clamps doing this repair. I have found pipe clamps to work better
> > > >for me. But hey, that's just me!  ;-)
> > > >
> > > >Terry Farrell
> > > Hi Terry ,
> > >                   I have 6 really heavy duty German made C clamps, with
> > > lots of torque.
> > > If  the lag screws go into spacer blocks I dowel the spacers to the back
> > > post  with 1/2" maple dowel.   Run the dowel through the belt sander to 
> > put
> > > a small flat down  it.  A liberal amount of epoxy down the hole. Insert 
> > the
> > > dowel rod, twisting it as you go. This will allow a space to get the 
> > excess
> > > epoxy to get out.  It will make the back support nice and solid.
> > > Roger
> > >
> 
> 


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