And UNM made its major purchase of Bs and Ds when the fine arts building was complete, in 1963 (lucky me!). This is teflon A, which should be distinguished from teflon B: smaller teflon inserts, without ridges. This design was the source of the clicking problems with humidity change (clicks between the teflon and the wood of the part, not between centerpin and teflon), and, I believe, high friction due to binding at the other extreme of humidity (the wood hole shrinking, and the teflon, not being hefty enough to resist, was squeezed around the pin). The thicker inserts with ridges addressed those problems pretty well. I don't know when that change was made. Probably in the 70s. Regards, Fred Sturm University of New Mexico fssturm at unm.edu On Aug 20, 2007, at 7:18 AM, Thomas Seay wrote: >> Hi List, >> >> Who knows when Steinway started with the dreaded teflon bushings? >> >> Thanks >> Paul > > Paul, > > From the Steinway Service Manual: > > Steinway & Sons introduced the teflon bushing in 1962, and was used > in all NY grand actions until approximately 1982. This represents > approximately 35, 000 pianos. > > Best wishes, > > Tom > -- > Tom Seay, RPT > 6701 North Park Drive > Austin, TX 78757 > 512-454-1452 - home > 512-659-6454 - cell > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20070820/d8cdc7f4/attachment.html
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