[pianotech] Kawai Pedal Lock Nuts

[Albert Picknell]

When there are locking washers between the two nuts I take them out and replace them with leather washers à la Yamaha.  That way I can squat down at the front of the piano, reach around the lyre, loosen the nuts, make any necessary adjustments, and snug the nuts back up again, all with my bare fingers.  I figure why crawl under the piano and mess around with two wrenches if I don't have to?

Bert

--- On Tue, 4/17/12, Ron Nossaman <rnossaman at cox.net> wrote:

> On 4/17/2012 10:50 AM, Joseph Garrett
> wrote:
> > Lim asked:
> > "Usually I locked the 2 nuts together but I have seen
> the lower nut
> > tightened to the rod. Which is correct?
> > Thanks from Lim"
> > 
> > Lim,
> > The key phrase is "Lock Nuts". Or, some people call
> them Jam Nuts. The idea
> > is to "jam" one nut against the other, thereby they
> will bind on the
> > threaded shaft. Most of the time this works as
> designed. However, if the
> > two nuts are perfectly mated, then they become one and
> will still pivot on
> > the shaft. If this occurs, then add a thin washer
> between the two nuts.
> 
> Nonsense. It doesn't matter a whit how perfectly mated the
> nuts are or not. If they are tightened together, they will
> grip the threaded shaft without turning.
> Ron N
>