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#641025 - 09/07/01 08:18 PM Sudden stiff centres
Vecke Offline
Junior Member

Registered: 09/07/01
Posts: 16
Loc: 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 09:08 PM Re: Sudden stiff centres
Bob Offline
3000 Post Club Member

Registered: 06/01/01
Posts: 3975
Is it possible the actions were lubricated with graphite at some time? Graphite can gum up over time, and would look like black carbon.
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#641027 - 09/07/01 11:11 PM Re: Sudden stiff centres
SamLewisPiano.com Offline
500 Post Club Member

Registered: 08/19/01
Posts: 635
Loc: 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
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