Bill, Could you repost Del Fandrich's post on teflon bushing service for us when you get to your home computer? I would be very interested to see what he says. Thanks. John Chapman Wake Forest University On Mon, 20 Dec 1999 Bdshull@aol.com wrote: > John: > > Del Fandrich had an extraordinary post on teflon bushing service a while back > which was on the Pianotech list sometime in 1999 (its on my computer at home > - I'm at the shop right now...). He was surprisingly supportive of the > teflon bushing concept, and had a procedure which he felt resulted in > longevity which rivaled the best cloth bushings (he was even critical of > Renner's use of graphite in the cloth). > > I have also used the file-rolled pins, but many years ago bought the > multi-cut reamers. The problem is their cost - someone has to pay for them, > and it doesn't seem worth it if the number of teflon actions out there is > rapidly diminishing. But the > rolled file centerpin technique does not accomplish what is essential with > teflon bushing service, which is to achieve a "machined" or evenly cut > bushing surface for the mated pin. Johnson Carbide supplied the reamers for > Steinway, but some of the reamers out there have been single-fluted; you > have to be careful to get a multi-fluted reamer, because the single fluted > reamer will not cut the bushing evenly. The Pianotek reamers have 4 flutes. > The complete set - RM-S8 - or a set of the smaller sizes graduated .0005" > would be best, I think, along with a good collection of new bushings. > > The problem with teflon is that most of us hardly see it anymore. I haven't > had enough work with it to get and keep my skills with it. Have a couple > sets in boxes to practice on if I really wanted too, though.... > > Bill Shull > University of Redlands, La Sierra University > > a message dated 12/19/99 1:35:07 PM Pacific Standard Time, chapmajd@wfu.edu > writes: > > << It may be time for me to upgrade my teflon bushing reamers. Any > suggestions? Presently I am using half size smaller pointed center pins > serrated between two files. Any other suggestions on dealing with teflon > bushings will also be appreciated. > > John D. Chapman RPT > Department of Music > Wake Forest University > Winston-Salem NC > >> >
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