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Steve_Bell · 9th Feb 2019, 10:04 pm

Thanks everyone for your replies. I will go the step/cone drill route, as I have one that will do 30mm.

I've just tried using a punch on a spare die cast box lid and it worked OK but I could see the lid deforming as I tightened the punch Allen screw. The punched-out circle was cracked into several pieces. I actually want to punch the holes in the box part, rather than a flat lid, and fear it might just crack or shatter under stress. At £20 for the box, I'll take the less risky option.

9th Feb 2019, 10:04 pm	#10
Steve_Bell Hexode Join Date: Sep 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 474	Re: Using hole punches on die cast boxes Thanks everyone for your replies. I will go the step/cone drill route, as I have one that will do 30mm. I've just tried using a punch on a spare die cast box lid and it worked OK but I could see the lid deforming as I tightened the punch Allen screw. The punched-out circle was cracked into several pieces. I actually want to punch the holes in the box part, rather than a flat lid, and fear it might just crack or shatter under stress. At £20 for the box, I'll take the less risky option. Last edited by Steve_Bell; 9th Feb 2019 at 10:12 pm.