[Files] knuckle pic

[David Love]

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. 
Double checked the regulation as well. 

David Love
davidlovepianos@earthlink.net


> [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