IV  GRAND PIANO ACTION

The numbers for the grand action do NOT correspond with those of the uprights above.

If you think this action looks complicated, think of the poor fellow who had to make the first on.  
He must have lost his mind.

If this graphic is too big to print out, copy OR "capture" it with a utility which can resize it before you print.

1.    Jack2.   Key lever button 
3.    Balance rail4.   Key lever center pin
5.    Center pin felt bushing6.   Jack adjustment button
7.    Jack adjustment screw8.   Action metal frame
9.    Hammer butt rail10.  Hammer butt-  
Usually resting on sand paper
11.  Hammer butt stop screw-  
Stops rep. lever upward motion
12.  Roller or knuckle
13.  Butt stop screw14.  Repitition lever
15.  Repetition lever spring with silk thread mounting16.  Repetition stop hook- Adjustable
17.  Repitition lever adjustment screw18.  Spoon-  Jack control
19.  Jack spring with silk thread mounting20.  Wippen flange
21.  Hammer rest rail22.  Hammer rest rail cushion
23.  Repetition lever flange24.  Capstan
25.  Hammer26.  Back check
27.   Back check wire 28.  Damper felt contact point
29.  Back key rail cloth30.  Wippen
31.  Jack button to adjust jack32.  Wippen rail

See a Grand Action in a virtual demonstration

Exceptional Grand Piano Action Link in several languages

 

 

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