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#641025 - 09/07/01 07:18 PM Sudden stiff centres  
Joined: Sep 2001
Posts: 16
Vecke Offline
Junior Member
Vecke  Offline
Junior Member

Joined: Sep 2001
Posts: 16
UK
The section on Steinway 'verdegris' prompts me to mention the mysterious stiffening of centres occasionally on Yamaha pianos. I have experienced hammer-flange centres suddenly stiffening so much that the hammer shank stays raised. On removal of the pin for re-centering, a black carbon-like material appears to have been released. Any explanations?

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#641026 - 09/07/01 08:08 PM Re: Sudden stiff centres  
Joined: Jun 2001
Posts: 4,625
Bob Offline
4000 Post Club Member
Bob  Offline
4000 Post Club Member

Joined: Jun 2001
Posts: 4,625
Florida
Is it possible the actions were lubricated with graphite at some time? Graphite can gum up over time, and would look like black carbon.

#641027 - 09/07/01 10:11 PM Re: Sudden stiff centres  
Joined: Aug 2001
Posts: 635
SamLewisPiano.com Offline
500 Post Club Member
SamLewisPiano.com  Offline
500 Post Club Member

Joined: Aug 2001
Posts: 635
WHITE BLUFF (Nashville area) T...
Just my 2 cents worth: I agree with Bob. I see a lot of Yamahas, so if this was a Yamaha phenomenon, it would be showing up. Definitely could be graphite.......Sam


Since 1975; Full-time piano tuner/tech in Nashville;
Lacquer and polyester specialist.

www.SamLewisPiano.com

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