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Tuning pins (piano) - Tightening. Part #1.

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Published on Aug 8, 2010

Состояние посадочного места колка не обеспечивает необходимого натяжения струны. maxim_tuner при помощи картонной прокладки запрессовывает нерабочий колок, и таким образом обеспечивает необходимую величину жёсткости между колком и посадочным местом.
http://www.pianoworld.com/forum/ubbth...

Эта ссылка на международный форум фортепианных техников, которые сейчас активно обсуждают возможность использования для ремонта гофрокартонной прокладки под колок
http://www.pianoworld.com/forum/ubbth...
Cardboard shim for loose tuning pin:

This is a cost-effective method of fixing a loose tuning pin. It avoids de-tuning adjacent strings, which can happen with methods that involve hammering tuning pins in.

First, turn the tuning pin enough to slacken the string coils. Then, using a narrow (but strong) screwdriver or an awl, lever the end of the string out of the tuning pin hole. (This point in the string is called the 'becket'). Lever against the tuning pin itself to prise the string out.

Now unscrew the tuning pin completely, leaving the string and coils in place. From some corrugated cardboard about 2mm or 3mm thick, cut a piece 20mm by 50mm. Insert this strip into the tuning pin hole (It may be helpful to curve the cardboard round a screwdriver shaft first, to make it easier to insert into the tuning pin hole). Firmly start the tuning pin into the hole, with the cardboard shim in place. Carefully turn the tuning pin into the hole, going quite slowly so as to avoid a build-up of heat. Turn the pin all the way in, to the same level as before.

Carefully insert the end of the string (the 'becket') back into the tuning pin hole, using suitable pliers. Make sure that the string coils are kept tight, using a stringing hook or a screwdriver.

Tune the string to pitch. The cardboard shim method will keep the pin tight for years and does not involve glue.




"Slightly unscrewing tuning pin "(without cardboard shim)

Here a complete "scenario" as a way to apply a tighten loose pin:

1. Loosen the pin and, using a thin but hard screwdriver with a thin stinger remove the tip of the string from the hole of a pin (becket).
2. Do not removing the string from a pin with considerable effort compressed fingers, use a T-bar, starting unscrewing tuning pin from the hole. This can be 3-5 or more complete cycles clockwise. It is very important to stop it's when your hand will feels the maximum pressure between a pin and "a body of wood". Should have the feeling that you no just to unscrewing a pin at the same time as pull it's pin like the feeling when we use pliers, pulling a nail out of wood.

3. Set the end of the string into the hole of a pin and gradually use very slow movement, begin to screwing clockwise. If this couple string bring almost to the desired tone it's couple pin. Before that as to tune loose pin.

4. Have strong pressure by own hand (fist) directed to the iron plate, gradually and slowly twisting a pin. In the beginning tuning is necessary to tighten a rings string using a screwdriver so it's located as closely as possible to each other. 5. In begin to make tuning couple pin. 6. Set the tone just above the standard pitch, to ensure that "unscrew pin" has enough friction.

7. Set "last and standard pitch "our "tightening pin"

It can make any layman.
Good luck

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