Agraffe reaming

[David Love]

I took those measurements from the post.  Never really thought about how
thick they were actually.  Thin and thick.  Your system certainly works.  I
saw you demonstrate it in Reno and have used it myself since.  But rather
than try and shuffle them around to fit, I either shim or trim.  

David Love
davidlovepianos@earthlink.net


> [Original Message]
> From: Ron Nossaman <RNossaman@cox.net>
> To: Pianotech <pianotech@ptg.org>; <davidlovepianos@earthlink.net>
> Date: 4/6/2003 11:28:09 AM
> Subject: Re: Agraffe reaming
>
>
> >I have routinely used shims for alignment.  A change in height of .007 or
> >.0035 at the agraffe will not make any appreciable difference in the
> >height, bearing or anything else.  The agraffe can also be trimmed if you
> >prefer to work that way.  If there is a concern, set bearing after the
new
> >agraffes are installed.  Sorting through the agraffes screwing them in
and
> >out of each hole to see which one happens to align seems like a very
> >tedious task and one in which it is very likely you will not end up with
> >everything working out just right anyway.
> >
> >David Love
>
> Where did you find 0.0035" and 0.007" shims? Pianotek carries 0.012",
and=20
> 0.020". Schaff has 0.010". The 0.010" will back the turn off 129.6=B0,
the=
> =20
> 0.012" will go 155.52=B0, and the 0.020" will go 259.2=B0. While I do=
>  certainly=20
> agree that these levels of height changes are insignificant, fitting=20
> agraffes for alignment isn't that big a deal - if you find a good lazy=20
> bum's method. I use a brass spacer cylinder that's the diameter of the=20
> agraffe shoulder, and cut to some length increment of 0.5"/36
(0.01388etc),=
> =20
> that is about 1.5 or 2 turns shorter than the agraffe stud. With the
spacer=
> =20
> in place on the spot face, it just takes seconds to drop in an agraffe,=20
> turn it down 1.5 turns to seat, visually evaluate the alignment, and
either=
> =20
> accept or reject it. I can check a half dozen in the time it takes me
to=20
> screw one all the way down, and all the way back out. Interestingly,
you=20
> will likely need fewer than 20% more agraffes than are needed for the
piano=
> =20
> to do the whole set without a single shim, or any shoulder reaming at
all.=
> =20
> If you still need to shim or ream anything, it will only be a couple,
and=20
> you are still way ahead in time.
>
> But that's just what I do.
>
> Ron N