Piano Damper Systems - Absolute Piano

The Sostenuto Mechanism

Clean sostenuto blade* Replace sostenuto bushings Regulate sostenuto tabs
	*All cleaning is done in our custom beadblasting cabinet with a fine powder at an appropriate pressure level depending on the material. Metal bearings are polished in the vibratory tumbler.

New Custom-Built Renner Underlever System

Hard rock maple damper lift tray
Spring tab underlevers
Modernize spring return
Replace underlever felt
Customize spacing to keys & replace pivot block spacers
Verify geometry and correct as needed
Sand underlevers w/600 & McLube 444
Swedge underlever leads
Regulate spring tension

Original Underlever System Fully Restored

Clean w/compressed air
Repair loose and damaged underlevers
Check for sticky levers & lubricate centers
Replace underlever felt
Clean underlever slots & regraphite
Check spacing to keys & replace pivot block spacers
Sand underlevers w/600 & McLube 444
Swedge underlever leads

At Absolute Piano, every detail of this entire mechanism is meticulously inspected and addressed. Our process is listed below but in short our goal is to replace or restore every part so that everything not only looks or is brand new but works efficiently without squeaks or malfunction and remains so for years to come.
Click on links below for more information and/or photos.

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Damper Systems | Sostenuto | Underlever System

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