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 -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20060329/6355831d/attachment.html
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