[pianotech] plate lags, (was persistent customer)

[A440A at aol.com]

In a message dated 12/29/08 10:30:58 AM, rnossaman at cox.net writes:
> > Ron, next time you fine tune a piano snug up the "plate lags" as you call
> > them after you are done--and then tell me it doesn't affect stability.
> 
> And if you leave them the heck alone, it doesn't, which is the
> point.
> 
Greetings, 
    It is worth noting here that the plate bolts on most pianos will be loose 
in the winter/dry period.   If you continually tighten them, they will 
continue to crush wood fibers during the next humid season, and the following 
winter, they will be loose again.   So, if you tighten them, continually, every 
winter, it will only be a matter of time before you go a full 360 degrees, 
effectively stripping the threads in the wood.   They should only be tightened in the 
summer, or, if your first visit is in the winter, give them a light snug,   
but don't really torque them in. 
   this doesn't apply to the Baldwin style, since they are anchored , via 
metal threads, against the iron of the plate. 
regards, 
 
Ed Foote RPT
http://www.uk-piano.org/edfoote/index.html



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