pinblock/flange fit

Don Mannino DonMannino@worldnet.att.net
Mon, 03 Mar 1997 19:28:09 -0800


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Vince,

The fulcrum concept depends a lot on how hard the bushing wood is. =
Pianos designed this way should use hard maple bushings which are =
drilled at the same time as the pinblock.

Are the holes in the bushings oval, with large gaps at the rear? If so =
then the pins have pulled forward, indicating this piano might be better =
off fit to the flange.

I'd remove tension just to see what's up before shimming the block fit. =
After the tension is lowered see if the pinblock moves back forward =
against the flange.  If so then the screws are not doing a very good job =
of holding it tight on the webbing.

Look over the rest of the pinblock anchoring, and try to have a good =
feeling for how the piano is built before you decide what to do.

Don Mannino RPT
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