***Re: Nine foot something - quickie hammer centre check

[Roger Jolly]

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Hi Kieth,
                 I recommend reaming out and burnishing to #21 to get rid 
of the garbage.
Roger Jolly.
Technical Consultant.
Samick Music Corp.


At 08:44 PM 3/10/2004, you wrote:

>I didn't look at them under a microscope but I think I should have gone 
>another pin size larger so the bad felt and crap got reamed out. I hope it 
>lasts. Next repinning job will only take me two hours.
>
>Keith Roberts
>
>On Wed, 10 Mar 2004 18:47:10 -0700, Kevin E. Ramsey wrote
> > OK, I haven't read all the posts, but now I think I know what you're 
> talking about. Locked up flanges on Samick pianos, when you re-pin you 
> see black stuff on the old pins, right?  I've seen a lot of this, like 
> whole actions or damper underlevers locked up so tight that you can hold 
> up the underlever parallel to the floor, supporting even the lead weights 
> while you're holding the flange. Roger says it's an application of 
> graphite gone bad.  I talked to one of their service reps who once told 
> me that there was tallow in the felt, and that if I just got a hair-dryer 
> in there and worked the flanges back and forth, they'd free up.  He also 
> said that the flanges must have been exposed to heat at some time for the 
> tallow, which may be like the lanolin normally found in wool, to 
> condensense onto the pin. Funny, when I looked at some of the pins under 
> magnification, it looked like a plating problem to me to. I work for a 
> dealer who sells samicks, so I'm the one to go out on these kind of calls 
> a year later. I've also talked to one or two other techs who did a repin 
> job, only to have the problem return a year later.
> >
> > It's still a problem, but we're seeing it less and less.
> > Kevin.
> >
> > I'm hoping that I'm not responding to something else, but this is a 
> problem I'm well aware of, anyway.
>
> > ----- Original Message -----
> > From: <mailto:Richard.Brekne@grieg.uib.no>Richard Brekne
> > To: <mailto:pianotech@ptg.org>Pianotech
> > Sent: Wednesday, March 10, 2004 3:44 PM
> > Subject: Re: ***Re: Nine foot something - quickie hammer centre check
> >
> > Hi Keith
> >
> > forget my last querry about the pianotype.... John suggests plated pins
> > being the problem... I wasnt awared that Samick used plated centers...
> > can anybody confirm this one way or the other?
> >
> > Cheers
> > RicB
> >
> > kpiano wrote:
> >
> > >>Black stuff in centerpin bushings ??? sounds like your typical graphite
> > >>to me.
> > >>
> > >>RicB
> > >>
> > >>
> > >>
> > >
> > >That's what I thought but the way the rest of the piano is, I 
> wondered. When I pulled some of
> > >the flanges there was paper on both sides of the flanges. sometimes 
> equal amounts. The guy
> > >that traveled the shanks the second time didn't do any better job than 
> the first guy.
> > >
> > >While I was reaming the bushings with my new set from Joe Goss, they 
> were making a squeal
> > >sound. I didn't get out my accutuner so I can't tell you what pitch it 
> was. Just on a slow push
> > >pull. Does Joe harmonically tune his reamers? Old damper heads from an 
> upright make a good
> > >set of handles for them.
> > >
> > >Keith Roberts
> > >_______________________________________________
> > >pianotech list info: 
> <https://www.moypiano.com/resources/#archives>https://www.moypiano.com/resources/#archives 
>
> > >
> > >
> > >
> >
> > _______________________________________________
> > pianotech list info: 
> <https://www.moypiano.com/resources/#archives>https://www.moypiano.com/resources/#archives
>
>
>

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