<html> At 08:37 PM 09/10/2000 -0400, you wrote: <blockquote type=cite cite>Not to belabor all this roller stuff, but........are you measuring the knuckle height while it is mounted in the shank? If so, I wonder if some of your variation is coming from the depth of the slot in the shank that the knuckle core mounts in. OR, I may simply not have a clue as to what/how you are measuring and you should just ignore this note.   Terry Farrell <blockquote type=cite cite></blockquote></blockquote> Yes, I measured knuckles which were installed on shanks. True, the slots may be different lengths but my money is on the core length. I'll be getting into the knuckle resetting tomorrow. Regards, Jon page <blockquote type=cite cite><blockquote type=cite cite>----- Original Message ----- From: <a href="mailto:jonpage@mediaone.net">Jon Page</a> To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a> Sent: Sunday, September 10, 2000 5:31 PM Subject: Re: Roller Size, again At 09:53 PM 09/10/2000 +1000, you wrote: Ron, Thanks for reiterating on the lower friction effect from a smaller knuckle. I should have gone into greater detail in my response but was pressed for time and figured your statement would be remembered and just left it at 'lower friction'. I still have the shanks separated in regards to roller height and will get someone on it tomorrow. I would imagine there is a tolerance granted for sanity purposes. As this is my first encounter with close examination of this height.  I will maintain a 0.010 window (+/- .005 from average height, this set's average is .645; so .640 to .650, it might get tighter as the work progresses). I included the thickness of the shank assuming that the shanks are uniform because I only have a thickness gauge and not a height gauge. I'll check the shanks' thicknesses tomorrow. Tolerance suggestions welcome. It's always something . . . Regards, Jon Page,   piano technician Harwich Port, Cape Cod, Mass. <a href="mailto:jonpage@mediaone.net" eudora="autourl">mailto:jonpage@mediaone.net</a> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ </blockquote></blockquote> <div>Jon Page,   piano technician</div> <div>Harwich Port, Cape Cod, Mass.</div> <div><a href="mailto:jonpage@mediaone.net" EUDORA=AUTOURL>mailto:jonpage@mediaone.net</a></div> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ </html>