I haven't done this, so this is just a thought. What would happen if you
do the big diameter first -just drill to the depth you want. Put in the
smaller hole saw. You now have a pilot hole that is in the center and
just drill out the smaller hole?
Roger Elliott
On Mon, 6 Nov 2000, Joe Curry wrote:
>
> Using the second (larger) hole saw to cut the larger hole for the recess
>sounds like a good idea, but I have found that unless you have
> a drill press to hold the saw in place and some way to clamp the piece you
>are sawing into, you will end up with a recess that is off
> center with the other hole.
>
> Therefore, if you have a drill press, clamp the piece onto the bed of the
>press and drill out the smaller hole. Then without releasing
> the piece, change to a larger saw and use a stop to set the depth of the
>recess. That should work fine.
>
> Joe
>
> Luke Lewis wrote:
> >
> > After doing this to both my old plastic dash, and the new Cherry dash that I
> > made this summer, I would definitely recommend using a holesaw of the
> > correct OD for the main hole, and another for the bigger OD section (That
> > takes some control but it's possible) ... Using a jigsaw makes it too easy
> > to bodge the job, and you don't get a second chance!
> >
> > Luke
> > '71 mk.IV
> > London.On.Can
> >
> > ----- Original Message -----
> > From: "Richard B Gosling" <Gosling_Richard_B@perkins.com>
> > To: "spitfires" <spitfires@autox.team.net>
> > Sent: Monday, November 06, 2000 9:02 AM
> > Subject: Clock mounting
> >
> > >
> > > After my adventures last week, losing my toolbox on the way home from the
> > TRGB
> > > Autojumble (see True Gentleman!), I did actually manage to come home with
> > some
> > > stuff from TRGB, including an old clock (which, with an old radio, a
> > battery
> > > clamp, and an armrest cost me a fiver!). This is not a perfect match for
> > the
> > > other gauges (it is a Keinzle), but it is the right size and reasonably
> > > similar, and it works (!), so I plan to fit it to Daffy - she's not a
> > tidy
> > > enough car for me to worry about acheiving perfection, by a long way!!
> > >
> > > Anyway, this means I will have to start chopping holes in my dash. I plan
> > to
> > > put the clock where the light switch currently sits, between the temp
> > gauge
> > > and the fuel gauge, so there are 3 nice gauges in a row - the light
> > switch
> > > moves to the far side of the steering wheel, currently empty.
> > >
> > > Anyway, my question - How do I cut the hole to fit the gauge? Presumably
> > I
> > > need a hole the diameter of the gauge body, plus a recess the diameter of
> > the
> > > outer rim, creating a stepped hole, so the gauge is recessed like the
> > others.
> > > The main hole is no problem - I plan to use an electric jigsaw - but how
> > do I
> > > create the slightly larger diameter recess? I suppose the perfect answer
> > is
> > > to use a router, but I don't own one, nor do I really want to spend the
> > money
> > > on one to fit a clock that cost me a fraction of a fiver. I do own a
> > couple
> > > of electric hand drills as well as the jigsaw, but that's about it for
> > power
> > > tools. Can I get an attachment for a drill that will do it for me? If I
> > try
> > > that have I got a hope in hell of keeping a straight-ish (or rather a
> > > smooth-ish-ly curved) line, and even depth? What else could I do? Can
> > > routers be rented, and if so, for what sort of money?
> > >
> > > Richard and Daffy (got me tunes now, just want to know the time!)
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