To be honest, if the intersection of the pin and felt is going to "nest", it will do so whether there's a "bend" in the felt or not; the "bend" isn't a hard edge unless you soak it with glue which is obviously counterproductive. I remain unconvinced of the efficacy of having a bend at the bottom in the button slot (which is a manufacturing efficiency) or the top; properly glued, with the proper glue (hide), and at the proper depth (in the range of 3/16"), the felt should be as stable as it's ever going to be. We've done a lot of rebushing here over the years, and have never had a problem with unstable or loose bushings glued in and trimmed flush to the top of the button. Paul In a message dated 10/22/2010 7:00:00 P.M. Central Daylight Time, erwinspiano at aol.com writes: Makes sense Jon and also the bend would avoid the glue build up that occasionally happens when a little bit too much glue has been applied to the cloth and the caul kind of smushes it toward the the top of the hole or deeper in the mortise as its pushed in. Now this never happens in my shop-...nah ,never, nada. Dale S. Erwin www.Erwinspiano.com Custom piano restoration Ronsen piano hammers-sales R & D and tech support Sitka soundboard panels 209-577-8397 209-985-0990 -----Original Message----- From: Jon Page <jonpage at comcast.net> To: pianotech at ptg.org Sent: Fri, Oct 22, 2010 1:14 pm Subject: Re: [pianotech] Key balance rebushing I thought the benefit of having the cloth bend over the corner was to reduce the 'nesting' effect around the pin. -- Regards, Jon Page -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101022/5e09ecf2/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC