Double drilling pinblocks: Hand held versus drill press.

[Farrell]

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Try it and let us know. .....But don't do it on my piano!!!

I would most certainly be surprised if you had good even torque. Use the =
drill press.

Terry Farrell

----- Original Message -----=20
From: "David Love" <davidlovepianos@earthlink.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, February 07, 2004 5:13 PM
Subject: Re: Double drilling pinblocks: Hand held versus drill press.


> I'm not sure we're talking about the same thing.  I'm refering to =
pinblock
> drilling in two passes.  If your final bit size is to be .261", then =
you
> predrill at .250" and on a second pass, drill the remaining .011".  On =
the
> second pass, because so little material is taken, you don't have to =
worry
> about feed speed and the drill heating up.  My question is whether =
that
> allows you to drill with a hand held and still be accurate without
> enlarging the hole. =20
>=20
> David Love
> davidlovepianos@earthlink.net
>=20
>=20
> > [Original Message]
> > From: Michael Gamble <michael@gambles.fsnet.co.uk>
> > To: <davidlovepianos@earthlink.net>; Pianotech <pianotech@ptg.org>
> > Date: 2/7/2004 1:46:50 PM
> > Subject: Re: Double drilling pinblocks: Hand held versus drill =
press.
> >
> > Hello List and David L
> > In the metal engineering world there is an old "dodge" that by =
initially
> > sharpening a drill bit so that one cutting face is longer than its =
pair,
> the
> > bit can be made to cut oversize. How does this help? It follows =
therefore
> > that the drill you use to cut a "hole-in-one" must be very =
accurately
> > sharpened. You can get away with this to a degree by using a =
"roughing"
> > drill followed by a "finishing" drill. In an earlier post I =
suggested that
> > to make a drill cut more precisely to its stated size the cutting =
corners
> > should be rounded off. OK?
> > Michael G (UK)
> >
>=20
>=20
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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