Metalworking – cutting bigger circles

Here is one that I did not know. I have drill bits that go from 1mm up to 10mm in 0.5mm increments. I needed to drill a 12mm hole in a panel that I had fabricated ready to take a grommet for a cable.

I checked in with a neighbour and he only had 10mm drill bit maximum as well, so I got online to order a 12mm and a 32mm one as well for another cable hole next to it.

Here is something called a hole cutter that comes as a pack of 3 allowing holes to be made in 2mm increments from 4mm up to 32mm. All 3 came in a little pouch for about £10.

And they worked so quickly I was rather surprised:

The 12mm hole on the right for the heater cable took about a second to cut from 10mm to 12mm. The one on the left needs the bigger cutter!

Inexpensive way of making lots of different sized holes!

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About Nick Gillott

Website Manager and General Committee member of the Owners Club. Owner of Eric the Viking (converted panel van with Viking roof) undergoing complete restoration. Tinkerer to Poppy the camper van (1972 Crossover dormobile).