Agraffe Counterbore Tool

[Frank Emerson]

I agree with Terry that it would be preferable to keep the hammer bore as consistent as possible.  In manufacturing, the counterboring is done on CNC machines.  It would be very difficult to keep the counterboring consistent, resulting in the strings being in a consistent plane, even if you do get it closer to the treble plane.  Would it be easier, and more even to grind the v-bar to raise the treble, rather than lower the tenor?  Is there room to lower the plate a bit to compensate?

Frank Emerson


----- Original Message ----- 
From: David Love 
To: Pianotech List
Sent: 5/24/2007 10:31:00 AM 
Subject: RE: Agraffe Counterbore Tool


Pretty hard to make any significant difference without major grinding of the agraffes.  I’d simply adjust the hammer bore assuming that the bearing is not at issue. 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 
-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Farrell
Sent: Thursday, May 24, 2007 6:59 AM
To: Pianotech List
Subject: Re: Agraffe Counterbore Tool

To get my tenor string plane down to the desired elevation (that of the two top treble sections). I know I can simply adjust the hammer boring, but I wanted to get all the long bridge sections (plain wire) as close to one plane as I reasonably could.

Terry Farrell
----- Original Message ----- 
From: David Love 
To: 'Pianotech List' 
Sent: Thursday, May 24, 2007 9:26 AM
Subject: RE: Agraffe Counterbore Tool

What’s the situation that you need to grind down the agraffes?

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 
have been happy with it.

But my current project needs to have all its new agraffes ground down a fair bit. I do not relish grinding all these agraffes by hand. I would love to put this thing in some slow turning machine and grind my agraffes that way. But what machine? I wish I could chuck it into my 1/2" drill press. This thing just reeks of some special purpose to the taper, etc. - what the heck is it supposed to mount in?

Thanks for any ideas/input.

Terry Farrell

Terry Farrell
Farrell Piano

www.farrellpiano.com
terry at farrellpiano.com
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