[CAUT] S&S teflon bushings - reaming procedure

[Don Mannino]

Mark and Wim,
 
The broaches I designed are not intended for Teflon bushings.  They are
for sizing and burnishing cloth bushings, and will not give very
consistent results with Teflon.
 
Using the fluted reamers supplied by Steinway is the best approach.
They really work well.
 
Don Mannino

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From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of
wimblees at aol.com
Sent: Friday, December 05, 2008 6:44 PM
To: caut at ptg.org
Subject: Re: [CAUT] S&S teflon bushings - reaming procedure


Mark

Buy Manino's reaming kit, and ream out the bushing and repin to get the
right friction. It will take a while, but well worth the effort. You
don't need polished pins, but if you've got them, use them. 

On the other hand, if you're going to sell this piano, it might be worth
it to replace the h/s/f. Customers who know, would think twice about
buying a 30 year S&S with Teflon bushings. The piano will most likely
sound and play a lot better with the new parts.  


Willem (Wim) Blees, RPT
Piano Tuner/Technician
Mililani, Oahu, HI
808-349-2943
Author of: 
The Business of Piano Tuning
available from Potter Press
www.pianotuning.com


-----Original Message-----
From: Mark Dierauf <pianotech at nhpianos.com>
To: College and University Technicians <caut at ptg.org>
Sent: Fri, 5 Dec 2008 3:57 pm
Subject: [CAUT] S&S teflon bushings - reaming procedure


Well, I managed to survive 30 years in business without having to deal
with these by simply replacing teflon vintage parts, but now I've got an
L action on the bench that needs sprucing up to ready for sale. Some of
the keys are at 80g DW(!), and quite a bit of that excess seems to be in
the hammer flanges. So I've gotten the "kit" from Steinway, but now I'd
like to hear from the experts on the best way to proceed. My 1972 S&S
Service Manual isn't much help ("ream the bushing accordingly", with a
target of "3 to 6 grams"). This is one of the later teflon pianos, with
the improved (ribbed) bushings. Any takers? 
 
Thanks, 
 
Mark Dierauf 
 


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