Wood Specie Insert for Capstan

William R. Monroe pianotech at a440piano.net
Mon Feb 25 12:49:06 MST 2008


Terry,

If you decide to replace wood, I'd probably opt for something like poplar.  I've used it for balance hole repairs and really like it.  I don't know how it rates next to sugar pine for expansion/contraction due to moisture, but I'd bet it's close.  Poplar seems to resist widening/enlarging at the BR hole well, and because of that, I think it would be appropriate for your repair (still allowing you to press in capstans).

FWIW,
William R. Monroe


SNIP
  So, I'm in the process of routing a 3/4" wide section out of the capstan area (instead of plugging again) from each key to start fresh. I was thinking of gluing a piece of maple in there, but then I thought, well, maybe the maple would be too hard for pushing in a capstan and expecting appropriate capstan-turning torque - maybe just strip the threads off the darn thing. Maybe I should use something softer - poplar perhaps? Or maybe I should go with a wood more close in characteristics to the original wood (think it is sugar pine) - I don't have sugar pine, but I think I may be able to find a little piece of Sitka Spruce somewhere around the shop. 

  Maybe a nice fine grained flat sawn piece of Sitka (I think that is where I am leaning)? Thoughts?

  Terry Farrell
  Farrell Piano

  www.farrellpiano.com
  terry at farrellpiano.com
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