Inside of a grand piano

The Piano and its Complex Mechanism

Expert Advice

A master in the art of tuning and repairing pianos for Greater Montreal and Valleyfield and surrounding areas, René Sauriol can explain the operation and mechanism of your stringed instrument to you, be it an upright piano or a grand piano. To learn more about the mechanisms by which these two types of piano produce fabulous melodies, see the following diagrams for the upright piano or grand piano.

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upright piano profile

Upright Piano

2- Damper felt

3- Damper head

4- Damper block

5- Hammer

6- Damper wire

7- Spring rail felt

8- Spring rail

9- Hammer shank

10- Hammer rail cloth

11- Hammer rail

12- Damper lever

13- Damper spring

14- Hammer butt spring

15- Damper flange

16- Hammer butt felt

17- Hammer butt buckskin

18- Hammer butt

19- Catcher shank

20- Catcher

21- Catcher buckskin

22- Backcheck felt

23- Backcheck

24- Damper lift rod

26- Main action rail

27- Jack

28- Letoff regulating screw

29- Letoff rail

30- Letoff button

31- Bridle strap

32- Letoff button punching

33- Backcheck wire

34. Damper spoon

35- Jack flange

36- Bridle wire

37- Jack spring

38- Wippen flange

39- Wippen

40- Sustaining pedal connecting rod

41- Lower action rail or sticker rail

42- Sticker

43- Sticker flange

44- Sticker tongue

45- Sticker cloth

46- Capstan screw

47- Back rail cloth

48- Key

Grand Piano

2- Damper head

3- Damper felt

4- Damper guide rail

5- Damper wire

6- Hammer

7- Hammer shank

8- Drop screw

9- Hammer flange

10- Main action rail

11- Damper stop rail

12- Damper wire block

13. Damper wire screw

14- Sostenuto rod

15- Backcheck

16- Hammer rest

17- Repetition lever screw

18- Repetition lever flange

20- Hammer knuckle

21- Repetition lever button

22- Wippen spoon

23- Combination jack spring and repetition lever spring

24- Wippen

25- Jack regulating button

26- Jack regulating screw

27- Letoff regulating screw

28- Letoff rail

29- Letoff button

30- Letoff button punching

31- Jack

32- Action bracket

33- Damper lift flange

34- Damper lift rail spring

36- Damper lever

37- Damper lever key cushion

38- Backcheck wire

39- Wippen flange

40- Wippen rail

41- Wippen cushion

42- Capstan screw

43- Key button

44- Balance rail key pin

45- Key

47- Damper lift rail

48- Back rail

49- Back rail cloth

50- Key frame

51- Balance rail

52- Balance rail bearing

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