[CAUT] Hammer Alignment

[Gary Mushlin]

Wim,

I'm sure it gets warmer than 120 degrees. Just think about it. It  
gets hotter than 120 degrees in a car on a hot day in summer in  
Kansas, but I have never been able to twist a hammer under those  
circumstances.

If you are only moving the hammer 1 or 2 degrees, why take the  
chance? Just twist the shank. If the Rappaports do it, then there  
must be something to it...

Sincerely,

Gary Mushlin, RPT


On Mar 29, 2006, at 6:38 PM, Wimblees at aol.com wrote:

> 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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