You will use the protractor to gauge the brake as you bend the metal little by little.
How to shape sheet metal at home.
After all there are only four things you can do to metal.
Simple sheet metal bender using a hand roller clamps and plywood.
Cut it bend it shrink it and stretch it.
Step 1 determine the angle at which you want to brake the metal and mark it on the protractor.
Clamp the sheet metal against your desk to hold it in place while you work.
And you can use the same technique anytime you need a straight cut on aluminum or other light gauge sheet metal even steel.
Apply masking tape to both sides of the sheet metal directly over the line you want to make.
Metal shops have brakes mounted at different angles with automated braking arms however it is possible to bend sheet metal at home without the use of a brake.
Then bend the sheet back and forth a few times to snap it.
This ensures a cleaner cut and prevents metal chips from scratching the sheet while you cut.
Clamp or hold a straightedge or square along the cutting marks and score a line with the tip of a sharp utility knife blade.
Now that you know your bend allowance take your protractor and draw a clear line with your marker across the point at which you will bend your sheet metal.
How can you go about shaping metal with hand tools alone.
Monkeys spinning monkeys by kevin macleod.
With a combination of these manipulations you can create anything from flat sheet and you.
Then use your bend allowance to draw your second bend line the intervening distance between your bend lines bend radius.