A jigsaw with fine teeth should be fine for the job. If you have
difficulty with the radius, grind down the back of the blade to about
4mm but don't let the blade heat up to much during grinding. Round of
the edges at the rear of the blade, this will help as well.
As you are cutting aluminium use some diesel/paraffin or WD40 while
cutting, to prevent the aluminium to clog up the saw. Move slowly at
high saw speed but with little pressure on the blade.
Finish with a large half round file using paraffin, WD40 or chalk crayon.
Kees Oudesluijs
NL
Op 21-1-2013 8:26, Peter & Veronica schreef:
> G'day list
>
> I'm currently making the dashboard for my 100 based Ausca race car. I'm using
> the Alfa instruments that came from the same sedan from which I sourced the
> 1750 motor. The tach and speed are 130mm Veglia instruments, the oil pressure
> and water temperature 50mm. I can cut the holes for the smaller gauges with a
> hole saw (I'm using 1.6mm aluminium) but the holes for the bigger gauges are a
> bit of a problem. I have a scroll saw, but I find the blades aren't really up
> to metal. Likewise I have a jigsaw that will handle the aluminium, but the
> blades are a bit wide for the arc of these holes. Anyone got any ideas for
> making a neat job of this?
>
> Cheers
>
> Peter Linn
> Brisbane Oz
> BN1 Ward Spl coupe
> BN1 Holden V6
> BN1 Ausca Alfa
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--
Kees Oudesluijs
Dorpsstraat 183
2995XG Heerjansdam
T: 078-677 1233
E: coudesluijs@chello.nl
Technische commissie Jensen Healey en GT
Het Jensen Genootschap Holland
www.jensenholland.nl
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