[CAUT] Hammer Alignment

[Wimblees at aol.com]

In a message dated 3/29/2006 1:17:00 PM Central Standard Time,  
garym at PIANOSERVICE.BIZ writes:

I used  to heat the glue joint to align hammers, until I found out that 
Titebond  begins to break down at about 120 degrees, and loses half its strength at 
 about 150 degrees. I got this info from a technician named Tom Patten in his 
 class concerning fire damage to pianos. My understanding is he got this  
information from Franklin, the makers of Titebond. I assume this applies to  
other glues as well.


It would be interesting to see how hot the glue joint becomes. I use a  
Weller heat gun, and put the nozzle about 2" or 3" from the glue joint. Then  I do 
as Ed does, although I don't hold on to the shank with pliers. I sort  of 
"swipe" at the glue joint until I can feel the hammer move. After all, in  most 
cases, we're only talking moving the hammer one or two degrees, so it is  not 
going to take much heat to loosen the glue joint. 
 
Wim 
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