On 29/05/2021 14:05, wrote:
On 29/05/2021 13:24, David wrote:
I need to cut a 30 mm hole in some 0.8 mm aluminium.

I have various hole cutting devices such as Forstner bits but they are
for
wood.

Is there anything clever for cutting holes in metal sheets?

If you haven't got a (Qmax) hole punch or hole saw then something like
this will do the job
https://www.toolstation.com/adjustab...-cutter/p44999. In thin
aluminium I would use a wooden block to reinforce the pilot hole area to
stop the pilot drill from waggling around

I have used this type before, as you imply they don't have much precision!

Step drill, of course, is another method for producing a 30m hole.