Broadwood broken tuning pin

[Gevaert Pierre]

Hi,

 

Plumbers use teflon tape against leaks in water or air pipes and you can
find it in any hobby shop. It is verry fragile and soft.

I’m not shure the tape will remain on the thread to the bottom of the hole
(into the wooden part) as it has to turn into the iron for about 2.5 cm but
you could give it a try. 

 

Here is a copy of a reply to your mail a few days ago. : 

 

Pierre 
  
The Boudoir grands I know about have the (square)pins screwed for about 2/3
into the iron plate and 1/3 into wood. 
I tuned several and some stayed in tune quite well (afther more than 130
years !) 
Others had the pins to loose. I don’t know if it is possible to find such
tuning pins nor if it these would hold better. 
There is some explanation on the left front side of the soundboard near the
basstrings but I think this is only to explain how to change a string. 
 I’m also interested to know how to make this kind of pins tight again. 
  
Like some use ca glue for wooden pinblocks would it be possible to use a
kind of product like Locktite for metal threads ? 
This is used for making the threads tighter and exists in several strenghts.

Of course this may sound stange for using this kind of stuff for historical
pianos but I can’t see another way exept maybe make threaded pins that are a
little bigger or maybe a better choise to change the wooden part of the
block (beech)so that at least the pins get some new grip there.

Some techs turn grand pianos upside down to put ca glue to the pins.

As a last ressort you could use solution as it is the only way to get the
pins in the wooden part tighter (unless you change the wooden part)  
  
In this way it would be possible to clean and reuse the original pins. 
There are many of those Boudoir grands remaining today so I would eventually
be possible to find another similar instrument for using spare parts. 
  
Pierre Gevaert

 

  _____  

De : pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] De la part
de stephan van meirhaeghe
Envoyé : jeudi 7 août 2008 20:55
À : pianotech at ptg.org
Objet : Fwd: Broadwood broken tuning pin

 

 

These are indeed square tuning pins that screw first in the iron plate and
also into the block.

I could bore them out but then the thread will be wasted, so have to make a
new (English?)
thread in the plate and make a new pin.
A pin extractor seems a possibility but one pin has broken just at the level
of the plate.
The pins are tight enough before I pull them out so I hope they stay that
way.
I think making new pins could be done by a company in my region.Hopefully
with the same 
square shape and same material.
I've also read about using PTFE tape for using just the lenght that goes
into the wood.
Anyone have experience with this Teflon tape and is this easy to find?

 

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