[pianotech] Kawai Pedal Lock Nuts

[Ron Nossaman]

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