This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment >>I am toying with trying to put a very thin coat of epoxy on either = side of the key about two inches on either side of the button. This may = give me the stiffness they need.=20 =20 =20 >From a structural standpoint all of your stiffness comes from the upper = and lower fibers of the key. Think of the key as an I-beam. The load of = the I-beam is carried by the upper and lower flanges. The web in the = middle carries next to nothing, it only connects the flanges.=20 =20 So adding stiffness to the sides will not accomplish much. It needs to = be added primarily to the portion under tension, that would be the top = of the key. Most of your deflection will come from the wood under = tension, not the part under compression. And the weakest part of the key = is the balance rail hole. So the greatest payback is to add your = stiffness to the button and the connection of the button to the key.=20 =20 Super glue would penetrate the wood and the glue joint of the button. = Keep it away from the bushing cloth, obviously.=20 =20 Dean =20 Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 =20 =20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/a7/e5/e9/2d/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC