The black stuff is probably the plating off the pin. Regards, John M. Ross Windsor, Nova Scotia, Canada jrpiano@win.eastlink.ca ----- Original Message ----- From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> To: "Pianotech" <pianotech@ptg.org> Sent: Wednesday, March 10, 2004 1:13 PM Subject: Re: ***Re: Nine foot something - quickie hammer centre check > Keith Roberts wrote: > > > Thanks Michael, and you are right, mind yourself, I'm back. Pianos > > only please. > > The pinning was a no brainer, it was all bad. I did it in three hours > > last night. What is that black stuff? The pin isn't corroded. > > I go with a four gram flange friction target. Is there any advantage > > to having the friction of the flange change with the weight of the > > hammer? Maybe in the bass it should be a little tighter, more stress. > > Keith Roberts > > > Black stuff in centerpin bushings ??? sounds like your typical graphite > to me. > > RicB > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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