turning front rail pins, .....etc.

[Roger Jolly]

Greetings to Jimmy the Shoe.
                                              I have news for you, all our 
snow has melted, and the geese are swimming on the river.

And guess what?   This pianer dealer often will turn (adjust) a pin on a 
brand, spanking new instrument, because the factory guy over squeezed.
And yes these pins are made to be adjustable.
Visit a piano factory, and you will see the operators making fine 
adjustments on these pins, by twisting them.
Now the rule of thumb for consistent friction, and feel, is .002" clearance 
for the BR and .005" for the FR
As a band aid fix I frequently twist the front rail pins, and flex the 
Balance rail pins back to get  the pin out of the cups. The keybed tightens 
up, and the action can be regulated with some reliability.  It sells a 
complete rebushing job every time.
Oh concert regulations I will always make minor adjustments to pin 
position,   It is the only way to obtain even friction, hence even touch.

Now I run into my melting Igloo
Regards
Phil Bryant



>Won't wash Joe. The balance rail pins are also subjected to this arcing
>movement of the key and they are round..aren't they? Some manufacturers 
>actually
>dallied with ovoid balance rails pins , M&H, Knabe, etc.............. both 
>went
>back to round pins. Front rail pins used to be round and the reason the ovoid
>pin was developed was to extend the life of the front rail bushings without
>regard to the state of technology developement at the time...........and we
>'still' do it the same way today. :-)
>Jim Jolly (freezin plains of Saskatoon)
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives