Enlarging existing bridge pin holes wtih a Dremel

[Mark Ultsch]

Hey Bill,

I don't have a specific model number, etc. on the Dremel.  It is at my
friends' shop about 25 miles away.  It's more like the Foredom (sp??)
tool, with about 1/3 HP motor and a cable to a handpiece.  The speed
control isn't a Dremel accessory; but a router speed control to plug
the Dremel into.  I'm not sure of the RPMs but I'm pretty sure it's
under 5K rpm.

I Don't exactly know the feeds and speeds that work best with any
particular reamer, if that is what you're hoping to learn.  All I know
is that it was easy to determine an RPM while applying an easy feed
pressure and keeping the tool "straight."

If you pin down the RPM's maybe you can share it with me to help
bridge the learning curve a bit.  I expect you'll be a notch above my
level of expertise.

See you,

Mark

----- Original Message ----- 
From: "William R. Monroe" <pianotech@a440piano.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, May 01, 2005 12:02 AM
Subject: Re: Enlarging existing bridge pin holes


> Hi Mark,
>
> Any idea how slow the RPM's could get with that speed control?  As I
said,
> the Dremel I'm thinking of using only goes down to 5000 RPM's.  I'm
not
> familiar with the "Industrial" Dremel.  How does that differ from
the
> "Consumer" level (XRP Variable Speed unit)?
>
> Respectfully,
> William R. Monroe
>
>
> ----- Original Message ----- 
> From: "Mark Ultsch" <multsch@jvlnet.com>
> To: "Pianotech" <pianotech@ptg.org>
> Sent: Saturday, April 30, 2005 9:34 PM
> Subject: Re: Enlarging existing bridge pin holes
>
>
> > Yes, Bill, I've used the industrial Dremmel ($100+), with a router
> > speed control for slower speeds.  There is a limit on turndown so
> > don't push and expect really slow RPM's.  I found it very
controllable
> > if you use the right reamer.  I'm certainly not an expert in this
> > area, though, as you know.
> >
> > Mark Ultsch
> > Madison
> >
> > ----- Original Message ----- 
> > From: "William R. Monroe" <pianotech@a440piano.net>
> > To: "Pianotech" <pianotech@ptg.org>
> > Sent: Friday, April 29, 2005 8:57 PM
> > Subject: Re: Enlarging existing bridge pin holes
> >
> >
> > > Anyone ever try using a Dremel tool for drilling out bridge pin
> > holes?  With
> > > the variable speed ones, it gets down to 5000 rpms.  Is that
still
> > too fast?
> > >
> > > Respectfully,
> > > William R. Monroe
> > >
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Ron Nossaman" <rnossaman@cox.net>
> > > To: "Pianotech" <pianotech@ptg.org>
> > > Sent: Thursday, April 28, 2005 6:56 PM
> > > Subject: Re: Enlarging existing bridge pin holes
> > >
> > >
> > > >
> > > > > Rather that a spiral reamer - use a straight fluted reamer
as
> > that
> > > > > definitely won't pull into the existing hole.
> > > >
> > > > Left hand spiral, right hand cut. It doesn't pull down as it
cuts,
> > > > it pushes back and doesn't chatter in wood like straight
flutes
> > can.
> > > >
> > > >
> > > > > Be very careful to hold the reamer at the same angle as the
> > original
> > > hole or
> > > > > - well - we don't want to see what would happen :-(
> > > > >
> > > > > John Fortiner
> > > >
> > > > Ouch! Very nasty. This is one of the two main reasons I had
for
> > > > using a modified drill bit.
> > > > Ron N
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> > >
> > >
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>
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