hammer shank length

[Ed Sutton]

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Yes, that is wierd!
How sharp is the shape of the V-bar?
The angles in the tenor and under the V-bar are about as steep as any I =
recall on any piano.
I wonder if the strings have been stressed through string seating or =
extreme overpull.
The one I work on is miserable in pitch raises.
Ed
  ----- Original Message -----=20
  From: llafargue=20
  To: 'College and University Technicians'=20
  Sent: Friday, February 20, 2004 9:08 AM
  Subject: RE: hammer shank length


  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. =20

  =20

  Lance Lafargue, RPT

  LAFARGUE PIANOS

  New Orleans Chapter, PTG

  985.72P.IANO

  llafargue@charter.net

  =20

  -----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

  =20

  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 -----=20

    From: llafargue=20

    To: 'College and University Technicians'=20

    Sent: Thursday, February 19, 2004 8:04 PM

    Subject: RE: hammer shank length

    =20

    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. =20

    =20

    Lance Lafargue, RPT

    LAFARGUE PIANOS

    New Orleans Chapter, PTG

    985.72P.IANO

    llafargue@charter.net

    =20

    -----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

    =20

    Lance,

    =20

    I'm wondering about plate/bridge location (hence speaking length) =
when you mention string breakage?=20

    =20

    I just can't believe this (the problem you describe) would happen in =
a new Mason...say it ain't so!

    =20

    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!=20

    =20

    In any case, the factory should be able to provide you with speaking =
length at #88 for a quick reference.=20

    =20

    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.

    =20

    Best of luck!

    =20

    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. =20

      Lance Lafargue, RPT

      LAFARGUE PIANOS

      =20

      New Orleans Chapter, PTG

      985.72P.IANO

      llafargue@charter.net

      =20

      -----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" =20

        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. =20

        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

        =20

        New Orleans Chapter, PTG

        985.72P.IANO

        llafargue@charter.net

      =20

                 Lance

      =20

         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?

      =20

         Dale

      =20

      Erwins Pianos Restorations=20
      4721 Parker Rd.
      Modesto, Ca 95357
      209-577-8397
      Rebuilt Steinway , Mason &Hamlin Sales
      www.Erwinspiano.com


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