This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Is the bushing felt graphited? The action movement heated it up, increasing the friction. Regards, John M. Ross Windsor, Nova Scotia. jrpiano@win.eastlink.ca ----- Original Message -----=20 From: David M. Porritt=20 To: pianotech@ptg.org ; caut@ptg.org=20 Sent: Friday, June 14, 2002 7:47 PM Subject: Tight bushings OK all you engineer types. I was repining some hammer flanges today = on a Steinway that has been in a practice room. Action parts are = Renner. It gets hard play 14+ hours a day. The action was rebuilt 4 = years ago. Nearly all of the bushings were quite tight -- most 1 or 2 = swings. A few had 3 swings and I was pinning for 4 so since the action = had been in the shop (idle) for a couple of weeks, I thought maybe I = could just vigorously work the shank a few seconds and it would swing 4. = I'd hold the flange and make the hammer swing back and forth fairly = forcefully for 5 or 6 seconds and then test it again. In each case the = ones that previously would give 3 good swings, now only gave 1. The = hammer dropped from horizontal to vertical and stopped dead. =20 What made the bushings get tighter by simply working the flange? I'm = stumped! dave _____________________________ David M. Porritt dporritt@mail.smu.edu Meadows School of the Arts Southern Methodist University Dallas, TX 75275 _____________________________ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/d9/be/71/ff/attachment.htm ---------------------- multipart/alternative attachment--
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