[pianotech] Treble String Replacement

A440A at aol.com A440A at aol.com
Tue Jul 14 08:13:59 MDT 2009


Wim writes:

<< Personally, I reverse the pin at least 3 full turns, and then, using a 
pair of needle nose pliers, guide the string into the hole of the pin, >>

         I recommend against this protocol.  Turning in and out three turns 
will reduce the pin torque, (I have measured a drop from 130 in/lbs to 110 
in a 10 year old Yamaha, and a drop from 100 in/lbs to 80 in a 40 year old 
Baldwin).  Perhaps a Falconwood or Delignit block will withstand it better, 
but there is no need to put this much wear on the block. If the piano is in a 
high usage situation, and you have to replace the string twice, you will 
certainly create a torque problem. 
      I turn the pin out 3/4 turn, only.  For me, using a dummy pin is 
faster, gives a better coil, reduces block degradation, and makes it easier to 
keep the pin at the original, finished height.
Regards,     
 

Ed Foote RPT 
http://www.uk-piano.org/edfoote/index.html
www.uk-piano.org/edfoote/well_tempered_piano.html
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