Tuning Hammer Technique and Staibilty Question

[Cy Shuster]

Steinway 1098's certainly have a lot of friction from the pin, over that cast plate nut and felt, and then through the pressure bar!  It's a great place to lubricate.  BTW, Kent Webb mentioned that the current production of this scale now has eliminated that cast plate nut entirely.

Based on a comment from a fellow tech to accidentally dumped lots of Protek on a grand pinblock, they did an experiment in the shop on a piano to be rebuilt.  Applying Protek liberally directly to a tuning pin affected torque, alright: it went UP!  Overnight, the torque came back down, just about to where it was before!

In the first tech's case, the tuning pins are still tight, some five years later!

--Cy--
shusterpiano.com 
  ----- Original Message ----- 
  From: pmc033 at earthlink.net 
  To: Pianotech List 
  Sent: Thursday, March 30, 2006 3:26 AM
  Subject: RE: Tuning Hammer Technique and Staibilty Question


      Also, remember that there is some friction of the wire over the bearing points.  Some pianos have a lot, some have almost none (Steinway uprights).  If the pitch doesn't change right away when you turn the pin, you have friction that is preventing the sliding of the string.  The understring felt is often the source of friction here, and you can put some protek lubricant on the string to help with this.  Just don't go hog wild and allow the protek near the tuning pin.  I use a hypo oiler and put the tip of the oiler along the strings in the felted area.  Just don't use any petroleum based lube here (WD-40).  
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