Pressure bar screw variation?

[Greg Newell]

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Greg Newell


At 07:16 AM 12/3/2002, you wrote:

>Friends,
>
>Yesterday as I was inserting the strip mute in the treble section of a
>one-year old Charles Walter studio piano, my hand brushed against a
>pressure bar screw which was loose.  I assumed it had broken off, so I
>took it out to look at it.  I was surprised by what I found.  It
>appeared to be threaded like a bolt, with the threads much closer
>together than wood screw threads, and there was a notch in the end as if
>it were designed to be tapping its own threads.
>
>Now my limited understanding of piano construction is that pressure bar
>screws go through holes in the plate to anchor into the wood behind it.
>In this case, however, it appears that there is a threaded hole in the
>plate itself for each of the pressure bar screws.
>
>Am I understanding the construction correctly?  Are any other pianos
>made this way, or are they all made this way and this is the first time
>my meager powers of observation are kicking in?
>
>On this piano I just snugged up this one screw, but the pressure bar at
>that place is out of line with the rest of the bar.  In my opinion there
>is still enough downbearing, but I could drop the tension on the strings
>in that area and tighten the loose screw down further to bring things
>into better alignment.  What think ye?
>
>Regards,
>Clyde
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives

Greg Newell
mailto:gnewell@ameritech.net

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