[pianotech] Kawai grand pedal lock nuts

[Don Mannino]

Some pedal rods are threaded on the outside at the top.  These have a
threaded cap on top which is screwed up and down to adjust the pedal.  On
this design the nut must be tightened up against the cap in order to lock it
in place.

 

Other pedal rods, like Kawai, have a pedal rod that is threaded on the
inside.  The adjustment is made with a long machine screw cap that screws
down into the inside of the pedal rod.  On this style, the nut must be
tightened down against the pedal rod itself.  

 

So the answer to Lim's question is, for Kawai, tighten the nut down against
the pedal rod.

 

I hold the rod tightly with one hand, and use a 10mm open end wrench to
tighten the nut down.  This is plenty tight enough to hold everything in
place, and allows the pedal to be adjusted for different pianists most
easily.

 

If you want to really lock it in place, you can use vice-grips to grab hold
of the pedal rod just above the guide bushing, then tighten the nut down
with the 10mm wrench.

 

Don Mannino

Kawai America

 

 

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of lim hock seng
Sent: Tuesday, April 17, 2012 6:11 AM
To: pianotech at ptg.org
Subject: [pianotech] Kawai grand pedal lock nuts

 

Usually I locked the 2 nuts together but I have seen the lower nut tightened
to the rod. Which is correct?
Thanks from Lim

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