Flange Center Friction Increase

[James Grebe]

I wonder since Y-C makes the Essex if this is going to be a problem with
them also?
James Grebe
Piano Tuner-Technician
Wood Artisan
Established 1962
Creator  of Wooden Artifacts such as:
Handsome Hardwood Caster Cups
Handsome Hardwood Piano  Benches
314 845-8282
1526 Raspberry Lane
Arnold, MO 63010

----- Original Message -----
From: "Chris Gregg" <cdgregg@telus.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, July 20, 2003 11:49 AM
Subject: Re: Flange Center Friction Increase


> I have a Samick grand action on my bench right now.  The problem I thought
> was sticking jacks, but on further investigation, the problem was the
> flange on the top of the repetition post. The repetition was not returning
> and therefore the jack was sticking on the knuckle.  I punched out the pin
> and noticed a residue on it, so then I punched out the bushing cloth to
see
> what the problem really was.  The cloth was hard.  Too much glue on it,
> making the graphite stick to the pin.  I re-bushed and re-pinned the
> offender, however, I do not see doing this to all the bad ones.   I have
> re-pinned thousands of Young Chang action centres over the years.  I was
> led to believe that there was a sizing problem with the action centre
cloth
> at one time.  Rep[inning I can handle, re-bushing is a pain in the you
know
> what.
>
> Chris Gregg RPT
>
>   At 07:50 PM 7/20/2003 +1000, you wrote:
> >No matter how 'gently' i try, i have never been able to put a cut centre
> >pin back in a bushing without knocking out the cloth! I would not
> >recommend trying this to anyone (unless they really want practise at
> >re-bushing flanges!).
> >
> >Scott Jackson
> >Australia
> >
> >----- Original Message -----
> >From: "Paul Chick (Earthlink)" <tune4@earthlink.net>
> >To: "Pianotech" <pianotech@ptg.org>
> >Sent: Saturday, July 19, 2003 10:07 AM
> >Subject: RE: Flange Center Friction Increase
> >
> >
> >| Terry
> >| Isaac Sadisgursky talked about this in his class on center pins at the
> >| Convention.  He demonstrated how a center pin can be too tight in the
> >| bushing cloth and loose through the wood, just the opposite of what it
> >| should be.  This problem can be spotted as you describe--fewer swings
as you
> >| go along.  Here's his test: carefully remove the center pin from an
> >| offending flange. Gently place it back in the bushed flange and check
the
> >| friction just by pushing the pin with your fingernail. Now place the
same
> >| pin in the wood and push it with your fingernail.  Chances are you can
push
> >| it right through the wood.  The problem is caused by using the assembly
wire
> >| used in the flange to size the bushing cloth during manufacturing.
When the
> >| flange is installed, the worker slides the wire back to clear the other
> >| member then slides it through and cuts it to length, fitting done.
Isaac
> >| says to watch for centers that are clipped on both sides of the flange.
> >| This will tell you a wire had been used.  He then went on to
demonstrate how
> >| to repin a set of flanges in about 45 minutes.
> >| Paul C
> >_______________________________________________
> >pianotech list info: https://www.moypiano.com/resources/#archives
>
>   http://www.tuneit.ca
>
>
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