Tuning Pin Size

larudee@pacbell.net larudee@pacbell.net
Sun, 27 Jan 2002 05:54:38 -0800


David Love wrote:

> ----- Original Message -----
> From: <larudee@pacbell.net>
> > Yamaha and Kawai supposedly do this better than
> > anyone except Joe Garrett, by drilling the bushing (actually a >hardwood
> plug) and the block together in the plate.
>
> This has always been a concern of mine when replacing plate bushings in an
> already drilled block.  Since the holes in the block are never perfectly
> centered underneath the holes in the plate, it means that the pin can
> actually be pushed slightly away from the front side of the hole in the
> block if the hole sits slightly forward relative to the plate.  Hopefully,
> I've expressed that clearly.

> David Love

Actually, according to Don Mannino, this is what Kawai (and probably Yamaha) try
to achieve -i.e. for the true fulcrum of pin leverage to be the bushing, with
both the block and the string tension exerting force on opposite sides of the
bushing (above and below), but in the same direction (towards the hitch pin),
like a vertical teeter-totter.  Perhaps Don could speak to this.

Paul Larudee



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