drilling into plate

[David ilvedson]

> Date:          Mon, 1 Sep 1997 22:28:28 -0500 (CDT)
> To:            pianotech@ptg.org
> From:          kam544@ionet.net (Keith A. McGavern)
> Subject:       drilling into plate
> Reply-to:      pianotech@ptg.org

I guess you just have to remember that at the factory/foundry 
they drilled those holes and you can be sure they didn't worry 
about it...

David ilvedson, RPT
Pacifica, CA  

> Dear list,
> 
> I have encountered a situation outside the realm of my experience.
> 
> Two bolts have broken at the pressure bar on a small vertical piano causing
> tuning instability.  The holes in the plate, however, do not line up with
> the pieces remaining in the wood block, and thereby restrict extraction.
> Can the holes in the plate be made larger by a simple drilling act without
> causing risk to the plate?  And if so, what type bit would work best?
> 
> Sincerely,
> 
> Keith A. McGavern
> kam544@ionet.net
> Registered Piano Technician
> Oklahoma Chapter 731
> Piano Technicians Guild
> USA
> 
> 
> 
>