dented piano wireOFF LIST

[Delwin D Fandrich]

----- Original Message -----
From: Ron Nossaman <nossaman@SOUTHWIND.NET>
To: <pianotech@ptg.org>
Sent: Monday, August 09, 1999 8:55 PM
Subject: Re: dented piano wireOFF LIST


> Yep, there's the trade off, which brings up another point. There's been a
> lot of discussion, written and otherwise, about notching techniques and
> standards, but I don't recall anyone stating what they considered an
optimum
> radius, or cut angle, where the notch and bridge top form the string
> termination. Everyone notching by hand seems to do it about... like so,
give
> or take a little. Is there an actual standard here? I've checked a number
of
> production machine notched bridges, old and new, and the cutter diameter
> seems to be about the size of a quarter for most of them, with the notch
> relief angle (?) being dependent on the depth of cut. Since you're the
only
> guy I know who's built one of these for shop use, can you tell us what
> cutter size(s) you're using?
>
> Ever the pest,
> Ron N
> ----------------------------------------

It is similar to a shaper cutter.  Three wings, carbide tipped, 90 mm in
diameter and set to cut approximately 6 to 7 mm deep.  (That last is from
memory.  I'd have to go check to be sure.)

Del