Tail Arcing

[Michael Spalding]

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Terry,

In the situation you describe, I usually remove the hammers and arc with the Spurlock jig.  Either take every other hammer, so you can re-space to the neighbors, or make a mylar tracing of the string grooves.

Why won't your hammer/shank assembly fit in the jig?

At Nashville, Guy Nichols showed a method for doing it without disassembly:  clamp a section of shanks (Spurlock shank clamp or equivalent), and arc with disc sander.  Much quicker, if you're confident in your ability to make a usable arc without sanding away some other part of the action <G>.

Mike

----- Original Message ----- 
From: Farrell 
To: pianotech@ptg.org
Sent: 11/3/2004 12:26:54 PM 
Subject: Tail Arcing


Anyone have any slick methods for arcing hammer tails on a set that are already mounted on their shanks? I have, use, and like the Spurlock tail arcing jig, but the hammer/shank assembly will not fit into the jig. 

This work is being done on an older good condition Baldwin grand action that someone installed new hammers a few years ago, but did not arc the tails. They are kinda squared-off. They do not check well and they are attacking the new backchecks. The piano owner is not interested in a new action, but rather to just try and make this one work reasonably well.

Thanks for any suggestions.

Terry Farrell
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