hammer crowns tearing apart (was Dolge)

[David Love]

If you know you are going to have to do a heavier needling, it is often
good to do it before you file.   Then the lighter needling you may need to
touch up will not have such an effect on the shape of the hammer.

David Love
davidlovepianos@earthlink.net


>
>     I think this is the problem in Yamaha hammers.  As they wear, the
crown
> "blooms", i.e., spreads wider, making the hammer pear-shaped rather than
its
> original "diamond" shape.  Anytime I've filed hammers on a Yamaha, not
only
> is it difficult to find a "layer", but the crown spreads apart even worse
> from the filing than it already had been from the string cuts.  So the
inner
> part of the hammer must be compressed too much or the outer part is
> stretched too much, or both.
>     If the tone is too bright after the filing, then any voicing with
> needles near the strike point (even if it's not right ON the strike point)
> makes the crown spread apart even more.  It's very frustrating and I'm not
> sure how to handle this problem.
>     --David Nereson, RPT
>
>
>
>
>
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