Drifting Jacks

Avery Todd ATodd@UH.EDU
Tue, 05 Mar 1996 14:04:38 -0600


>That is an incompetent repair.  The way to fix a rubbing jack is to tap on
>top of the jack while supporting the whippen arm.  This is best accomplished
>with the whippen out of the piano.  The effect is to slightly bend the
>centerpin.   Either that or fry it with a blowtorch.

Correct. IF the pinning is correct to start with. Make sure it's tight in
the birdseye (sp?) and snug but free in the felt bushings. The jack could
also be
drifting because the birdseye is worn and there is space allowing the jack
to drift.

If that's the case, short of replacing the jacks, I don't know what the
repair would be.



_____________________________________
Avery Todd, RPT
School of Music
University of Houston
atodd@uh.edu
_____________________________________





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