This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Perhaps another good way to evaluate a knuckle-to-center-pin distance = match would be to adjust let-off so it did not occur, replace the front = key pin punchings and felt with a block of wood, and then carefully = measure hammer rise for a full key depression. The wood under the key at = the front rail pin will ensure a repeatable key depression amount, and = if the effective knuckle distance is the same on both the old and new = shanks, the hammer rise will be exactly the same. Terry Farrell ----- Original Message -----=20 From: "David Love" <davidlovepianos@earthlink.net> To: "Barbara Richmond" <piano57@flash.net>; "Pianotech" = <pianotech@ptg.org> Sent: Wednesday, March 10, 2004 11:31 PM Subject: Re: [Files] knuckle pic > I have a sample kit of Abel parts that I got from Wally Brooks. = Basically, > I weighed the strike weight of the hammer assembly on a sample note = and > also measured the corresponding balance weight ((UW + DW)/2). Then I = took > a sample shank and wrapped a piece of lead solder around the end of = the > shank to duplicate the SW of the original sample (easier than trying = to > find a hammer just the right weight). Put it on the piano and = measured the > balance weight again. It was closest to the original with the 18mm = flange. > Abel and Renner both make a 17mm flange but only Abel makes an 18 mm > flange. Since there was a bit more lead in the key than I would like = at > the target strike weight for that note, I opted for the 18mm flange.=20 > Double checked the regulation as well.=20 >=20 > David Love > davidlovepianos@earthlink.net >=20 >=20 > > [Original Message] > > From: Barbara Richmond <piano57@flash.net> > > To: <davidlovepianos@earthlink.net>; Pianotech <pianotech@ptg.org> > > Date: 3/10/2004 8:19:07 PM > > Subject: Re: [Files] knuckle pic > > > > So, David, what did you do? Did you measure, figure what was close = and > buy > > some samples? > > > > Barbara Richmond > > > > ----- Original Message ----- > > From: "David Love" <davidlovepianos@earthlink.net> > > To: "Pianotech" <pianotech@ptg.org>; <files@ptg.org> > > Sent: Wednesday, March 10, 2004 8:46 PM > > Subject: RE: [Files] knuckle pic > > > > > > Speaking of which, I am replacing a set of these on an AB Chase. = One of > > the challenges of these knuckles is trying to determine just where = the > > leverage point is. You don't exactly have the normal core/center = pin > > dimension to reference. It appears, however, from my initial = trials, that > > it corresponds most closely to a C-18 shank from Abel, i.e. a Mason = Hamlin > > style shank with an 18 mm knuckle to center dimension. > > > > David Love > > davidlovepianos@earthlink.net >=20 >=20 >=20 > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/15/85/0d/d6/attachment.htm ---------------------- multipart/alternative attachment--
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