The high breakaway friction in the Teflon bushing was largely a function of how tightly the pins were fit. The things had a rather wide tolerance for overly tight pins; the actions would work reasonably well with pins that were a bit too tight but the breakaway, or startup, friction would be high. If the pins were fit just a bit on the free side they were fine. Also, it was important that the friction of both sides of the action center be approximately the same. If one side was loose and the other tight the aggregate friction would feel about right but the breakaway friction would be high. ddf Delwin D Fandrich Piano Design & Fabrication 620 South Tower Avenue Centralia, Washington 98531 USA del at fandrichpiano.com ddfandrich at gmail.com Phone 360.736.7563 From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Don Mannino Sent: Monday, November 29, 2010 1:24 PM To: caut at ptg.org Subject: Re: [CAUT] F..riction Alan, I haven't experienced that friction effect with Teflon. I have found this to be very bad with graphited cloth bushings, but always felt Teflon had very low startup friction. Maybe I just didn't observe carefully - I don't think I ever looked for it. My experience was that I liked the tone of pianos with Teflon bushings very much, but just had the usual longevity issues. Hopefully the WN&G bushings have solved this by being a more resilient material. So for it would seem so! Don Mannino -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20101129/1cd4c930/attachment-0001.htm>
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