Barbara, One of the problems in measuring touchweight of teflon-bushed parts is that the resistance to movement of the part at rest is rather large, but then when the part is in motion, resistance is very small. So static measurements of touchweight in these actions are less useful than in wool-bushed actions. Maybe someone else out there has found a way to deal with these actions. My way is to replace the parts ASAP. Alan -- Alan McCoy, RPT Eastern Washington University amccoy@mail.ewu.edu 509-359-4627 > From: Barbara Richmond <piano57@insightbb.com> > Reply-To: "College and University Technicians <caut@ptg.org>" <caut@ptg.org> > Date: Mon, 14 Nov 2005 09:14:32 -0600 > To: "College and University Technicians <caut@ptg.org>" <caut@ptg.org> > Subject: Re: [CAUT] Teflon and felt bushings > > I need a history lesson here. Were all those Teflon pianos I faced at IWU > heavy just because they were Teflon or poorly pinned Teflon or a geometry > problem or something else? So what was the touchweight like on those > hybrids? > > Barbara Richmond > > > ----- Original Message ----- > From: "Conrad Hoffsommer" <hoffsoco@luther.edu> > To: "College and University Technicians" <caut@ptg.org> > Sent: Monday, November 14, 2005 8:39 AM > Subject: Re: [CAUT] Teflon and felt bushings > > >> At 09:23 AM 11/14/2005 -0500, you wrote: >>> I just inspected a 1981 B, and found that the hammer shank bushings are >>> felt, but the wippen bushings are teflon. First of all, when did Steinway >>> stop using the teflon bushings? And second, would Steinway have used >>> teflon wippens and felt shank bushings? According to the owner of the >>> piano, the hammers have never been replaced. >>> >>> Wim >> >> >> I did the factory tech week in '82, and at that time they were >> "transitioning" out of teflon. They were using up the stocks of teflon >> which they had left so that there were a number of hybrids during that >> period. >> >> >> >> Conrad Hoffsommer - Keyboard Technician >> Luther College, 700 College Dr., Decorah, Iowa 52101-1045 >> 1-(563)-387-1204 // Fax 1-(563)-387-1076 >> >> - Right now, I'm hoping to live until my age matches my golf score, >> - Until then, I'll have to be content to have my IQ match my handicap. >> >> _______________________________________________ >> caut list info: https://www.moypiano.com/resources/#archives >> > > > _______________________________________________ > caut list info: https://www.moypiano.com/resources/#archives
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