In a message dated 9/10/2000 6:56:23 AM, Ron O. wrote: <<"I wrote it Jon. I was referring to the use of smaller rollers on those modern grand actions with a 99 mm distance between the wippen and jack centres (which covers most modern actions - certainly everything modern from Renner, Boston, Kawai, Samick, Steinway, Yamaha and Young Chang). When these actions are fitted with a typical 10.5 mm roller, the contact between the jack and the roller will be 7 - 8 mm below the line of centres, ie.">> Ron; Thanks for clearing that up. I understood that the smaller knuckle was to address the geometry concerns and did not in and of itself offer less "friction". I can see how someone, who was thinking differently, could have read your comment to mean that "smaller knuckles reduce friction" whenever used. Jim Bryant (FL)
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