I confess I cannot knowledgeably describe how this alignment thing works, but I do know that I have tightened (with appropriate tools) two nuts together on the same threaded shaft, only to have them turn easily and smoothly as one. Obviously others have experienced this as well. I have always imagined it to be the beginning/ending threads were in some relationship to one another where one left off, the other begins sort of thing. Yes, I know . . . . I find your opposing directions notion interesting, and not one I've previously entertained. I'll have to think about this more, and see if I can't experiment at some point, ideally with a rod that's not stuck up under a piano! Paul Milesi RPT Washington DC (202) 246-3136 Cell/Text paul at pmpiano.com http://www.pmpiano.com On 4/17/12 2:29 PM, "Ron Nossaman" <rnossaman at cox.net> wrote: >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 >
This PTG archive page provided courtesy of Moy Piano Service, LLC