Spring Rail Rebuilding

[Joseph Alkana]

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Terry,
This has happened to me many times. I have very small drill bits that I =
simply chuck reversed in a drill press leaving a very short length so as =
not to snap off the bit. Choose a size that barely makes it into the =
hole, that way you are assured the bit (actually a drift at this point) =
will be a teeny bit bigger than the wire trapped in the hole. Should =
work. You can use a piece of thicker piano wire as a drift if you can =
get a piece straight and de-burr the ends and file it flat.

I don't know what the standard practice is for sorting out the spring =
weight for each section, but I just use heavy springs in the bass, =
medium in the tenor, and the lighter ones for the rest of the action.  =
In any event, you will need to adjust the spring tension once installed =
because all the supply house springs are set for maximum return right =
from the package.
Joseph Alkana  RPT
josephspiano@home.com
  ----- Original Message -----=20
  From: Farrell=20
  To: pianotech@ptg.org=20
  Sent: Wednesday, September 19, 2001 6:02 PM
  Subject: Spring Rail Rebuilding


  Hi Folks. Rebuilding an upright action. Hammer butt spring rail. =
Removed all
  springs EXCEPT for three short pieces of spring wire that are =
apparently
  stuck in original holes in rail (broke off). Gotta get 'em out so that =
I can
  install the new ones. I have tried pushing them through to no avail. I =
guess
  I can drill next to them, but that will screw up alignment a tad - =
maybe not
  too much. There is nothing to grab on to to pull on. Any =
recommendations for
  removal? Or should I just drill right next to original hole? I am =
constantly
  amazed at little tricks to remove original stuff.

  Also, I purchased medium and heavy hammer butt springs. What is the =
accepted
  wisdom in placing these? If both are to be used, I suspect heavy in =
bass and
  at some point in scale switch to medium. Should both be used? Where =
should
  the change be made?

  Thanks big time.

  Terry Farrell




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