This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Hi,Wsley! Good post,worth repeating.. The description of this phenomena was in the Journal good 15 years ago..I wrote it sharing this info after spending some time with John Light,then with Kimball.John did some research on this topic and the answer is:Yes,return spring felts were glued with the glue which later had some reaction,penetrated the felt and affected[oxidation] springs.Even if they appear intact-it still can be misleading to a novice technician and the cycle of key easing,hammer flange repining can start with no results. To make long story longer-all return spring MUST be replaced and Kathy Voss,RPT from Chickagoland,gave the best program at one of the Nationals.Her method of replacing springs is the most efficient..Done it,it works!! Best of Luck.. Isaac _____ From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Wesley Hardman Sent: Sunday, February 26, 2006 7:31 AM To: Pianotech Subject: Hammer Butt Springs Like most of you, occasionally I run across a piano manufactured 35-40 years ago in which hammer butt springs are missing, and those that remain can be broken off by just touching them. Does anyone know specifically why this happens? Is it the properties of the metal used to make the springs, or is it a reaction caused by the felt surrounding the springs that causes them to become brittle and easy to break? Wesley Hardman Alabama ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/21/62/75/5a/attachment.htm ---------------------- multipart/alternative attachment--
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