I would anneal the plates, regardless, as they have a tendency to snap in the middle if tightened off centre, by accident of course. On 27 July 2011 01:25, Joseph Garrett <joegarrett at earthlink.net> wrote: > Ron said: "This will give you the numbers. Sometimes the Internet is > actually good > for something. > http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html > > Brass expands more. So as you heat the things up, the steel screws > should get looser in the brass, then tight again as everything cools. > I'm not sure it's been satisfactorily determined whether the whole > annealing process is worth the trouble though." > > Ron, > Thanks. That does gives some "numbers" to the question. Not sure if the > numbers tell me anything more than brass expands a lot more than steel.<G> > My "gut" tells me to get rid of the flanges, but IF the annealing process > gives them a new life, (which they have had for 100 years now.), it would > be a whole lot less hassle to keep them. Of course, I must think of the > "Long Term" implications as well. Hmmm? I've seen good results with > annealed brass rails. The fellow that does them has done the rails with and > without the screws and plates attached. He hasn't found there to be any > difference, although he did add: "so far".<G> Things to think about for > sure. > Joe > > > Joe Garrett, R.P.T. > Captain of the Tool Police > Squares R I > > -- Bruce Browning The Piano Tuner -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110727/6491bb0a/attachment.htm>
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