Has anyone had Schaff reproduce brass rails in the near past? I have a Kimbell upright that needs this done and I wanted to know if there are any problems associated with installing the new rails and old flanges... Thanks in advance... David Ilvedson, RPT Pacifica, CA > Date: Mon, 22 Jun 1998 14:59:48 -0500 > To: pianotech@ptg.org > From: Conrad Hoffsommer <hoffsoco@martin.luther.edu> > Subject: Re: Brass Rails > Reply-to: pianotech@ptg.org > At 12:05 6/22/98 -0700, you wrote: > >Gregory Torres wrote: > > >I have heard that if you anneal brass (heat it to some temperature and > >let it cool slowly), this cures the brittleness > > >> BTW, maybe someone can explain why stainless steel has not been used in this > >> type of application > > The metallurgists on the list surely can supply hardness numbers, but my > guess is that the brass being softer than the centerpin does at least two > things. > > Since ductile is opposite of brittle... > 1. Flange will slightly mold itself around pin, affording a more secure > clamping. > 2. Being softer, it would also be quieter if flange is slightly loose. > > No facts to back me up, just some idle thoughts. > Anybody who actually knows something wanna jump in? > > Conrad > > > > Conrad Hoffsommer Office - (319) 387-1204 > Luther College Music Dept Fax - (319) 387-1076 > 700 College Drive > Decorah, Iowa 52101-1045 hoffsoco@martin.luther.edu > > Ignorance doesn't kill you, but it will make you sweat a lot. - Haitian proverb > > >
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