Double drilling pinblocks: Hand held versus drill press.

[Carl Meyer]

----- Original Message ----- 
From: "Farrell" <mfarrel2@tampabay.rr.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, February 08, 2004 5:01 PM
Subject: Re: Double drilling pinblocks: Hand held versus drill press.


> z'Rather than getting obsessed with a few looser than I'd
> like,  I give them the ole ca (crazy glue) treatment."
>
> On a new pinblock??????????????????????????????????

After singing its praises for old blocks are you saying it won't work for
new ones??????????
Actually, I've never replaced a block, don't have any plans to ever do one,
unless I get a piano from Florida, that is.  (G)

Carl Meyer Ptg assoc
Santa Clara, Ca.



> Terry Farrell
>
> ----- Original Message ----- 
> From: "Carl Meyer" <cmpiano@comcast.net>
> To: <davidlovepianos@earthlink.net>; "Pianotech" <pianotech@ptg.org>
> Sent: Sunday, February 08, 2004 2:40 PM
> Subject: Re: Double drilling pinblocks: Hand held versus drill press.
>
>
> >
> > David, I've drilled a block or three free hand, but not double drilled.
> > Before I built my pinblock drilling machine, I did turn an upright on
it's
> > back, fill the pin holes with epotec epoxy and then drill the holes by
> hand.
> > The drill size was enough to use oversize pins (Don't remember the sizes
> > involved).  I considered it successful, but no amount of ingenuity and
> > foresight on my part has resulted in perfect torque no matter what
> procedure
> > I've tried.
> >
> > My gut feeling is that double drilling by hand would be iffy and I
> wouldn't
> > think accuracy would be improved.  I'd speculate that making the first
> drill
> > no more than maybe 2/3 the final diameter would give the second drill a
> > better chance of alignment by hand.  That would then eliminate the
heating
> > effect.  The drill I used had a bubble to hold the drill perpendicular.
I
> > think that helps.
> >
> > I recall asking Willis Snyder many years ago if double drill pinblocks
was
> a
> > good idea.  He said
> > "That works with metal but not wood."  I wish I'd asked him why.
> >
> > Sometimes I'm surprised at how well pin block torque works in spite of
all
> > the variables.  Rather than getting obsessed with a few looser than I'd
> > like,  I give them the ole ca (crazy glue) treatment.  It's only
> guaranteed
> > for life anyway.  That's my life of course.
> >
> > Carl Meyer Ptg assoc
> > Santa Clara, Ca.
> >
> >
> > ----- Original Message ----- 
> > From: "David Love" <davidlovepianos@earthlink.net>
> > To: "Pianotech" <pianotech@ptg.org>
> > Sent: Saturday, February 07, 2004 2:13 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.
> > >
> > > David Love
> > > davidlovepianos@earthlink.net
> > >
> > >
> > > > [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)
> > > >
> > >
> > >
> > >
> > > _______________________________________________
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> >
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> >
>
>
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