Teflon bushings

[John D. Chapman]

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
>   >>
>