Simply line up your chisel along the line you are going to cut and strike the back of it with a hammer.
Best method to cut sheet metal.
The metal sheets used to form the roof need to be cut to fit your roof before you can install them but fortunately this is easy to do with a few different tools.
There are two ways to cut round ducts.
A handheld cutting tool fitted with a metal cut off wheel will easily cut through sheet.
So the geometric cut is quite hard to do in this case.
If you ve hit it hard enough the chisel will cut the sheet metal if it s thin enough.
The method you choose to cut sheet metal depends on the thickness of the metal and the type of cut you plan to make.
To cut straight lines use an electric saw.
Straight cutting compound snips work best for cutting thick or doubled up sheet metal.
First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.
Start by taping both sides of the sheet metal directly over the line you want to cut and clamp the metal to a work station so it doesn t move.
Probably it s also the cheapest way for cutting corrugated tin roofing.
The speed and orientation of cutting with laser tools are limited within 2d.
Jigsaws and metal cutting band saws are more work but can make most cuts in light to medium sheet metal.
Snips are ideal for cutting any type of corrugated roofing especially for cutting softer metal like tin sheets.
One of the fastest most precise sheet metal cutting methods is to cut with high power laser.
But the discs wear down quickly cut slowly and shrink in diameter as you use them.
You could also use a circular saw to cut lots of sheets more quickly and a nibbler to create rounded cuts.
They don t cut curves well.
Use tin snips or shears to cut lengths by hand.
Using a chisel and hammer is the most basic form of cutting sheet metal.
An angle grinder fitted with an abrasive metal cutting disc works well to cut all kinds of metal including bolts angle iron rebar and even sheet metal.