Frozen or Binding regulating screws

[Carl W. Meyer]

Arnie;  Try heating the screw where it goes thru the wood.  One way is to
use a filament transformer of about 6 volts at 3 amps and with two metal
probes, pass current thru the screws.  You may have to test a few to find
the optimum time of application. The probes will arc so put them where it
won't damage the surface that will contact felt or something.

Carl Meyer


> [Original Message]
> From: arnie <arniex@earthlink.net>
> To: <pianotech@ptg.org>
> Date: 7/28/00 6:10:06 PM
> Subject: Frozen or Binding regulating screws
>
> 
> Hi, List.
> 
> I have just finished inspecting the action of an old Hallet & Davis baby
> grand. (The serial number seems to have been long ago obliterated but I'm
> guessing it's about 60-70 years old.)  The piano was just "rebuilt" but
the
> "rebuilder" didn't bother to regulate the action. This action isn't a
little
> out, it's grossly out! Perhaps the reason it wasn't regulated is that most
> of the regulating screws are binding so badly I think they would break, or
> worse -  strip the holes if they were turned any large amount.
> 
> I will shortly be attempting to regulate this action. I'm looking for any
> experiences out there with techniques to free up  binding regulating
screws.
> It has been suggested that I try pin-point applications of Proteck's
Prolube
> liquid, which I will. But I would like to have more than one card up my
> sleeve before I start this job. Can anyone suggest other approaches?  I
> thought of  Liquid Wrench, but would it harm the action?
> Thanks,
> 
> Arnie
> Arnold D. Moss
> Associate Member, PTG
> 
> 
> arniex@earthlink.net
> 



--- Carl W. Meyer, Santa Clara, Ca.
--- cmpiano@earthlink.net