This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Hi List, String breakage, I never got all the answers on this subject so I will = ask, why do the strings break at the point where the wire starts curving = around the tuning pin? I have a CF Yamaha in my care that is now breaking strings in the bass = A0, B1 & G1. All singles. So far. All T pins are loose. History. The piano has been stored in a 5% humidity environment, the = tuning pins are loose some very loose, and over the last 5 years the = piano is constantly out of tune with pins slipping. Constant spasmodic = tuning, The owners wants to know what is the cause of the breaking strings ? = What is the cause ? I have read most of what was said on this subject but I can't recall if = an answer was given. Please help me give the right information to the owners. To me, I am querying the clues given in this thread and am offering and = asking for assistance in either proving or disproving the following = theory. Because when piano wire is down down to the required dimension, the = outer part of the wire goes hard while the inner core remains softer. 1. Is this process work hardening the wire in a controlled process = and then other excessive bending causing the outer side hard wire to = crack. ??? 2. Should piano wire because of the hard outer and soft core be more = likened to a metal tube filled with lead. What would happen if you flex or bend the tube back and forth a few = times, would this cause the metal tube to crack. ? I am no engineer or metallurgist but this seems feasible to me. BUT = what do I tell the owners that caused the strings to break. Regards Tony Caught caute@accessnt.com.au ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/f7/d2/ef/f5/attachment.htm ---------------------- multipart/alternative attachment--
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