There are two ways to cut round ducts.
Tools to cut thin sheet metal.
Simply line up your chisel along the line you are.
They are essentially metal cutting scissors that are stronger and more durable than standard scissors.
In our test it cut through rebar like a hot knife through butter.
It may not be an obvious choice but fitted with the right blade a circular saw is a great metal cutting tool.
They look like scissors and work fine with sheet metals like brass aluminum tin steel etc.
Tin snips or aviation snips are one of the most widely used tools to cut sheet metals.
Thick using a ferrous metal cutting blade.
Aviation snips and tin snips are a common method of cutting thin sheet metal for hobbyists.
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.
If you are committed to learning how to cut sheet metal by hand the cheapest solution by far would be using an aviation snip set.
First if you want to cut a duct near the middle and use both ends mark and cut the duct before snapping it together.
Then grip the saw with both hands and push the blade through the metal to cut it.
These tools are good for cutting soft sheet.
Cut metal with your circular saw.
Tin snips have heavy blades that can cut through thin sheets of metal.
You can cut mild steel up to about 3 8 in.
To cut straight lines use an electric saw.
Double headed sheet metal nibbler rexbeti drill attachment metal cutter with extra punch and die 1 cutting hole accessory and 1 step drill bit perfect for straight curve and circle cutting gold.
They don t cut curves well.
Using a chisel and hammer is the most basic form of cutting sheet metal.
For thin sheets of metal you can use tin snips to cut through it.
For stainless tubing a circular saw is a perfect tool to use.
Such as straight cut snips left cut the right cut etc.
After doing the first two steps you are ready to cut your stainless steel.
Straight cutting compound snips work best for cutting thick or doubled up sheet metal.
There are some cuts that you can do with decent tin snips.
