Charles,
I am part of a small minority (so far) that uses the term "squaring the hammers" to mean what most techs call "burning the shanks" (never could figure out what to do with all those ashes after burning…).
I'm guessing that you mean arcing the hammer tails, so they have a desired radius and present a surface that is "squared" to a forward-facing backcheck. Performing this operation requires a sander (can be belt or disc) and a jig for the hammer. It is no big deal, if you are tooled up for it. I am curious who it is that will sell you the hammers and bore and taper them, but does not offer arcing as well. (That is unusual, and not the case with Brooks, Pianotek or Renner USA, the vendors I used when outsourcing these services.)
Alan
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Alan Eder, RPT
Herb Alpert School of Music
California Institute of the Arts
Valencia, CA
661.904.6483
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Original Message:
Sent: 06-22-2017 13:43
From: Charles Gibson
Subject: "Squaring" grand hammers
I need to replace two sets of grand hammers. I'm having both sets custom bored and tapered, but not squared. My supplier doesn't do that. They insist it's "easy to do."
Does anyone know if there is any video(s) or other pictorial instruction that shows how squaring grand hammers is done?
Your help will be appreciated.
-Charles