[pianotech] Expanding leads

Dale Erwin erwinspiano at aol.com
Wed Mar 13 08:04:14 MDT 2013


David
 I have a 1905 German O with spruce key wood that shows the leads to be slowly corroding and possibly expanding. In this country the N.Y.Stwy keys has always been made of Calif. sugar pine and I have not seen lead issues in this wood


Dale Erwin R.P.T.
Erwin's Piano Restoration Inc.
Mason & Hamlin/Steinway/U.S. pianos
www.Erwinspiano.com
Phone: 209-577-8397




While I have run into expanding lead problems periodically generally they seem 
to have been reserved for "lesser" pianos.  Today I found a 1950's Boesendorfer 
200 with leads expanding both in the back action and the keys to the extent that 
they were binding on their neighbors and on the verge of splitting things.  Of 
course I will have to remove and replace, a large task considering the new 
weigh-off at the key end that will be required.

My question is what is it that causes that reaction and why after such a time 
does it happen.  This is some 60 years later. 


David Love
www.davidlovepianos.com



 
 
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