At first locate the center of the whole.
How to best make a 2 hole in sheet metal.
Use your center punch to strike at the center of the hole.
Blacksmithing for beginners cutting a square hole in sheet metal.
The wooden bread layers of the sandwich keep the sheet metal flat and prevent the drill bit from wandering as it bores through the sheet metal.
Next use a compass to outline the edge of the hole.
Tap your hammer to leave an indentation on the sheet metal.
The punch is then.
Place the die over the draw stud before inserting the stud through the pilot hole.
This will create dimples in the sheet.
To setup the punch first drill a pilot hole into a piece of sheet metal with a step drill bit.
For clean precise holes in thin sheet metal make a wood sandwich.
Put your ink to the use and mark the hole center.
How to use chisels instead of files to cut a share hole for carriage bolts.
Place your sheet metal on your steel block and position your centre punch at a central point in your cut out design.