In our experience a very small amount of graphite did little harm. We were never able to determine whether or not it actually did any good. We did find out, however, that just slightly too much could cause action centers to freeze after extended play. ddf _____ From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Don Mannino Sent: April 01, 2009 9:38 PM To: pianotech at ptg.org Subject: Re: [pianotech] graphite and center pins? Jim, The graphite, if present, was most likely put there to improve the performance at the factory. It does not cause a sluggish center, nor does it stop sluggishness from happening. The idea is to reduce the friction level while giving a firm, controlled fit in the bushing. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090402/702d191b/attachment.html>
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