hammer shank length

[llafargue]

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Angles are steep and in this model you may recall, the V bar goes
through the tenor section, not just the treble.  Tenor is where they are
breaking, which is weird.  
 
Lance Lafargue, RPT
LAFARGUE PIANOS
New Orleans Chapter, PTG
985.72P.IANO
llafargue@charter.net
 
-----Original Message-----
From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of Ed
Sutton
Sent: Friday, February 20, 2004 6:58 AM
To: College and University Technicians
Subject: Re: hammer shank length
 
Lance-
What are the bearing angles like in the front duplex of the new BB?
In the late Aeolian BB's the agraffe section is very short and the capo
sections have very steep bearing angles in the front.
String travel problems - excess tension in front duplex and sharp bend
tending to injure the wire at the V-bar, plus hard hammers hitting on
the V-bar could cause string breakage.
You may be able to rehang the hammers a little further back on the
original shanks...no need to trim hammer shanks!  And voicing hammers
may help.
Ed Sutton
----- Original Message ----- 
From: llafargue <mailto:llafargue@charter.net>  
To: 'College and University <mailto:caut@ptg.org>  Technicians' 
Sent: Thursday, February 19, 2004 8:04 PM
Subject: RE: hammer shank length
 
Thanks Mark,
I don't mean to alarm anyone, I'm hoping there is a simple solution and
not a major problem here, too.  I know the players at this piano and I
don't believe there is heavy playing.  Two broken strings in a month and
when I first saw the piano the hammers were hitting the V-bar at C8
(dead).  I'm still waiting to hear from tech support after talking to
two other people who passed me around.  I'll keep you posted.  
 
Lance Lafargue, RPT
LAFARGUE PIANOS
New Orleans Chapter, PTG
985.72P.IANO
llafargue@charter.net
 
-----Original Message-----
From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of
Mark Cramer
Sent: Thursday, February 19, 2004 6:38 PM
To: College and University Technicians
Subject: RE: hammer shank length
 
Lance,
 
I'm wondering about plate/bridge location (hence speaking length) when
you mention string breakage? 
 
I just can't believe this (the problem you describe) would happen in a
new Mason...say it ain't so!
 
For Pete's sake, they're only producing two models of grands
(currently), you'd think they'd have the jigs right, especially when you
see the size of plate-location pins they use! 
 
In any case, the factory should be able to provide you with speaking
length at #88 for a quick reference. 
 
I don't want to send you on a goose-chase Lance, but often find it
useful to look at a problem from more than one angle.
 
Best of luck!
 
Mark Cramer,
Brandon University
-----Original Message-----
From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]On Behalf Of
llafargue
Sent: Thursday, February 19, 2004 11:50 AM
To: 'College and University Technicians'
Subject: RE: hammer shank length
I agree, it's just hard to see what's going on back there and I think
ideally the hammers would be rehung, especially if it's also
contributing to string breakage.  I'll study it closer to see if I can
tell exactly what's hitting back there.  
Lance Lafargue, RPT
LAFARGUE PIANOS
 
New Orleans Chapter, PTG
985.72P.IANO
llafargue@charter.net
 
-----Original Message-----
From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of
Erwinspiano@aol.com
Sent: Thursday, February 19, 2004 9:08 AM
To: caut@ptg.org
Subject: Re: hammer shank length
In a message dated 2/19/2004 6:26:20 AM Pacific Standard Time,
llafargue@charter.net writes:
5" to 5 1/8"  
If the hammer is mounted much longer than 5 1/8", touch gets heavy, if
shorter than 4 7/8", you get regulation problems and reduces leverage.
Also, tails may hit whippen flanges when hammer comes to rest.  
I just worked on a 2001 M&H BB and the hammer line was so off, if you
pushed the action in for proper strike @ C8 the back checks interfere
with sostenuto and under levers, no matter what.  The piano is also
breaking strings at the V bar and I suspect the hammer line has
something to do with it.  Regards,
Lance Lafargue, RPT
LAFARGUE PIANOS
 
New Orleans Chapter, PTG
985.72P.IANO
llafargue@charter.net
 
           Lance
 
   In that case I see nothing wrong with using a motortool drum sander
to hollow out the back of the backcheck. Some new backcheck replacement
I've used for stwy's have this featire which is helpful when installing
modern type back action In an old stwy with minimal clearances. This
might give you enough room to move the action to its proper location.
What do you think?
 
   Dale
 
Erwins Pianos Restorations 
4721 Parker Rd.
Modesto, Ca 95357
209-577-8397
Rebuilt Steinway , Mason &Hamlin Sales
www.Erwinspiano.com

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