Perhaps the compresion set is actualy in the flange wood behind the bushing, rather than the felt. Or a bit of both. Thump --- Don <pianotuna@accesscomm.ca> wrote: > Hi Bill, > > So why do *forced* drying methods lead to even > looser centers than the > overnight natural drying then? Something is wrong > with the theory of > "compression set" I fear. > > As "rapid" fixes sometimes a heat gun or hair drier > by itself will > work--particularly if some misguided tech has used > wd-40. It seems to "burn > off" the contamination--at least for a while. > > At 07:43 PM 12/13/02 -0500, you wrote: > >Sarah, > > > >Your experience seems to be completely the opposite > of those of us > >who have used the alc/H2O treatment quite > successfully. The alcohol > >is a surfactant, allowing the wool cloth to soak of > the water. Water > >laden, the bushings now squeeze against the center > pins, and during > >the 24 hours (roughly rumored thereabouts) is takes > the water to > >evaporate, the wool fibers take a compression set > around the pins. > >Once the bushings have dried out this compression > set will have > >produced a looser fit. > > > >Granted it won't work on bushings contaminated by > paraffin oil or > >WD-40, or rusted pins. But those situations are the > extreme (except > >of course for an entire era of Steinway), and are > easily spotted. > > > >Time is an unavoidable ingredient in this process. > Simply soaking the > >bushing and immediately thereafter chase it out > with a hairdryer > >won't allow the compression set to occur. Tommy > should confirm that > >this action is not suffering from one of the > exceptions, then pick up > >pick it up some morning, apply the alc/H20, and > bring it back the > >next morning. > > > >Bill Ballard RPT > >NH Chapter, P.T.G. > > > >".......true more in general than specifically" > > ...........Lenny Bruce, spoofing a radio > discussion of the Hebrew > >roots of Calypso music > >+++++++++++++++++++++ > >_______________________________________________ > >pianotech list info: > https://www.moypiano.com/resources/#archives > > > > > > Regards, > Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. > Tuner for the Center of > the Arts > > mailto:pianotuna@accesscomm.ca > > http://us.geocities.com/drpt1948/ > > 3004 Grant Rd. > REGINA, SK > S4S 5G7 > 306-352-3620 or 1-888-29t-uner > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com
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