I agree the method gives immediate results and long term damage (verified). But it is not about center pin, it is about old worn bushing it is addressed. Bushings are a bit more longer and difficult to replace (especially when there is only a few). Isaac OLEG > -----Message d'origine----- > De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part > de Richard Brekne > Envoyé : mardi 18 septembre 2001 10:48 > À : pianotech@ptg.org > Objet : Re: Adjusting Action Centers > > > While understanding the desire to find a easier and better way of doing > things... I have to ask why not just change the centerpin ? I > cant see that any > real time is saved by any of these alternative methods, and > further some of > them really have the potential to make matters worse by > inadvertantly or even > on purpose damaging the surrounding wood. > > It really is pretty quick to simply change a center pin, and that > gives the > opportunity to fix / kontroll other aspects of center pin > maintaince concerns.' > > JMV > > Richard Moody wrote: > > > There is a method of tightening action centers but use at your own risk. > > They might come out too tight, or peers might cry "unprofessional". In > > that case consider it experimental. > > > > 1. With a voicing needle poke two to 4 times in the bushing around the > > pin. This is to compress the felt around the pin. > > > > OR > > > > 2. With the smallest hole punch, (like what is used in player > piano work) > > "Tamp" the bushing. Press the punch into the bushing so to press it > > inwards. > > > > 3 Since it is better to have a dull punch, the "Moody Bushing > Tamper" can > > easily be made. Pull the pin out of a center pin punch. > Enlarge the hole > > in a drill press to near the size of a #24 center pin. Bevel > the edges > > on a grinder enough to clear the wood. > > > > > > -- > Richard Brekne > RPT, N.P.T.F. > Bergen, Norway > mailto:Richard.Brekne@grieg.uib.no > > >
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