[pianotech] Kawai Pedal Lock Nuts

[Ron Nossaman]

On 4/17/2012 12:19 PM, Paul Milesi wrote:
> "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
>
>
> Ron,
>
> Empirically, I can't help but believe this simply isn't' true.  In
> my experience, Joe's comment about the threads of the two nuts
> sometimes ending up perfectly aligned after tightening does happen,
> and the result is that the two nuts turn as one on the shaft just as
> easily as one, no matter how tight.  Have seen this on a couple
> occasions, and no amount of tightening will change that reality, once
> they are as tight as they can be.
>
>
> Interesting that I inquired about this back on 1/21/12, and received
> a few answers.  The one from Paul Bruesch was the one I trusted the
> most at that time.  I think Joe's got it right now.

It just isn't physically possible. If the nuts are tightened together, 
the threads are jammed in opposite directions on the shaft and they 
won't turn on the shaft. If they turn, they aren't tight. What 
"alignment" are you talking about that would make them turn?
Ron N