Hammer bore distance update

[David Ilvedson]

I didn't know these were new hammers....explain how one get the correct bore distance from samples?   I was under the impression you needed string heights and center pin height?   How does an old hammer give you the correct blow distance?

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "David Love" <davidlovepianos at comcast.net>
To: "Pianotech List" <pianotech at ptg.org>
Received: 10/23/2007 7:56:42 PM
Subject: RE: Hammer bore distance update


>Paul's idea is better.  Call Lloyd at Renner and talk to him about the
>problem.  If it's their mistake I'm sure they will redo it.  

>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 David Love
>Sent: Tuesday, October 23, 2007 7:49 PM
>To: 'Pianotech List'
>Subject: RE: Hammer bore distance update

>Sometimes when you send samples they add a few mm's to compensate for
>estimated wear.  Sometimes they get it wrong.  Better to measure and send
>specific dimensions.  

>A little tricky to redrill an entire set when the hammers are tapered and
>tailed but it can be done.  You will need a boring jig.  Take them off, plug
>them with dowels and proceed slowly and carefully.  

>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 Cal Munson
>Sent: Tuesday, October 23, 2007 7:03 PM
>To: pianotech at ptg.org
>Subject: Hammer bore distance update

>Thanks List for your responses.  The piano is a Steinway A and the  
>bore distance, I am told should be 46 mm
>My own 'A' has an ideal bore distance of roughly 44 with some  
>sections at 44.5 and others at 43.5

>The hammers in question, Renner Blues, have been drilled with a bore  
>distance of 49 mm (center of hole to striking surface of hammer) so  
>they are 5 mm off.   The old hammers with shanks were sent as samples  
>so it is a mystery........ However,  I don't see a downside to having  
>the hole filled and then re-drilling.   But I have not done it  
>before... Anyone?

>Cal Munson