pinblock drills and drift

[John Ross]

Hi,
I was at a class, recently, where Andre Bolduc, replaced a pinblock in
a Steinway. He did it in 3 hrs, and it included drilling the tuning pin
holes.
Previously, I had just used a centre punch, and dimpled the location
for the drilling of the pinblock holes. He said use drill bit that just
fits in the plate hole, and just start it, and remove. Then when you
remove the block, to drill at the drill press with the proper size bit
for the pins, there is no wandering, as the V dimple fits the profile
of the drill tip.
I think I got his explanation right, and I hope it would solve the
problem of keeping the drill at the exact position you want it.
Regards,
John M. Ross
Windsor, Nova Scotia, Canada
piano.tech@ns.sympatico.ca
----- Original Message -----
From: "David Love" <davidlovepianos@hotmail.com>
To: <pianotech@ptg.org>
Sent: Wednesday, June 20, 2001 1:14 AM
Subject: pinblock drills and drift


> I'm drilling a block where the holes in the plate webbing leave very
little
> room to spare.  I need to use a drill bit that has absolute minimal drift.
> Any suggestions?
>
> David Love
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