[pianotech] broaches for flange bushing

[David Weiss]

Hello List,

 

Do the roughened areas of broaches used for flange bushing need to be
sharpened periodically? 

 

I'm in the middle of re-pinning a set of hammer flanges and it seems some of
the broaches cut better than the others.  If yes, what's the best way to
sharpen them.  

 

Thanks,

 

David Weiss

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