Re: Using hole punches on die cast boxes
I'd be reluctant to do it - the biggest hole I've ever free-punched in cast-alloy was for a RCA "Nuvistor" triode and that was only about 0.7 inch.
For 'holing' diecast where I can't specify the holes as part of the original casting, I've used "cone-cut" stepped borers, or when it comes to an 8x6 hole for a loudspeaker, drilling a load of 3mm holes. knocking-out the centre, then taking-out the rough edges with a rotary file.
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