I don't have a source, have wondered myself. When the loop at the end, to which the thread attaches, has broken, I have simply bent a couple coils from the spring part to make a new loop. Making them yourself would be pretty tedious, considering the number of turns. Abel does quite a bit in the way of providing parts for obsolete pianos. I wonder if they would be willing to supply such springs. There is probably a sufficient demand somewhere - more in Europe than in the US I suspect - to make it worth the trouble.
There are also several spring manufacturers who will manufacture to samples/specs. For instance,
http://www.msspring.com/index.html http://www.springsfast.com/ https://www.centuryspring.com/ I have no experience with this, but maybe someone else does. I know that if I were planning on wholesale replacement, I would look into having them made rather than doing it myself. And there may be something someone stocks that can be made to work.
-------------------------------------------
Fred Sturm
University of New Mexico
fssturm@unm.edu http://fredsturm.net "When I smell a flower, I don't think about how it was cultivated. I like to listen to music the same way." -Federico Mompou
-------------------------------------------
Original Message:
Sent: 04-17-2014 14:25
From: Henry Nicolaides
Subject: Square Grand Jack Springs
This message has been cross posted to the following Discussions: Pianotech and CAUT .
-------------------------------------------
Hi all, and thank you for your kind and helpful replies to previously posted questions,
I have need for resources for a repair/restoration project of an 1880 Chickering Square Grand and an 1866 Steinway Square which will follow the Chickering. Currently I am looking for a source of the small jack spring to replace fatigued and broken springs. Or, will I have to make the springs? Also any other information you would like to share is appreciated.
Henry
-------------------------------------------
Henry Nicolaides
Piano Technician
Southern Illinois University
Carbondale, Illinois
email: henryn@siu.edu
Phone: 618-967-3796
-------------------------------------------