Restoring old uprights

[John Ross]

Hi Charles,
There is not much give and take to drill the holes off centre.
The plate is still on, and you drill the hole in the block, through
the existing hole in the plate. Use the 3/8" for the holes with no
bushings, and the 1/2" plugs for the ones with bushings, which
you remove.
Cut a slot in the plug, to allow the plug to bottom, instead of trying
to compress the trapped glue or epoxy.
Also drilling off centre, would not retard the plug from rotating, as the
amount would be minimal.
Regards
John M. Ross
Windsor, Nova Scotia, Canada
piano.tech@ns.sympatico.ca
----- Original Message -----
From: "Charles Neuman" <piano@charlesneuman.net>
To: <pianotech@ptg.org>
Sent: Sunday, August 12, 2001 3:30 PM
Subject: Re: Restoring old uprights


> Newton wrote:
> > One is to drill a large hole into the block
> > and replace the removed material with pin block plugs and redrill.
Great
> care
> > needs to be taken to assure that the plugs are well and truly glued into
> place
> > and that they will never (nearly) rotate.
>
> I wonder if you drill the holes for the plugs so that they are off center
> from the hole where the pins were and will be. That way, the plug would be
> restricted from rotatating. That would involve somehow "remembering" where
> the original tuning pin holes were. Maybe you could make an outline of
where
> all the pins are, drill the plug holes off-center and then use the outline
> to drill the new holes.
>
> I might be way off here. I don't really know anything about drilling a pin
> block. I'm still near the beginning of the Potter course! Give me some
> time...
>
> Charles Neuman
> PTG Assoc.
> Nassau County, NY
>
>
>