These problems are common for those of us who don t work with sheet metal every day.
Where to cut sheet metal.
These photo steps show that it can be done using a utility knife.
But the discs wear down quickly cut slowly and shrink in diameter as you use them.
To cut straight lines use an electric saw.
A handheld cutting tool fitted with a metal cut off wheel will easily cut through sheet.
Also referred to as aviator snips these scissor like hand tools cut sheet metal materials up to 18 gauge in thickness accurately without leaving a ragged bent edge as the finished product.
It s the same material ducts are made of and is commonly sold in large flat sheets in 18 to 28 gauge thicknesses you can also find sheet metal in aluminum or even copper and brass and they all can be cut using the same tools and techniques.
But you don t have to be a tinsmith to cut sheet metal successfully.
Once you have the starter hole work your way out to the desired radius using the correct red or green colored snip.
Instead we recommend using a diamond blade that s rated to cut ferrous metal.
For thin sheets of metal you can use tin snips to cut through it.
If you use metal shears to cut thin sheet metal such as duct metal it curls and can be difficult to flaten properly.
Jigsaws and metal cutting band saws are more work but can make most cuts in light to medium sheet metal.
For cutting out holes in sheet metal it s going to be necessary that you begin with a starter hole this can be formed by using the hammer and chisel method to punch through the metal.
Apart from hand nibbler there are electric nibbler drill powered nibbler and pneumatic nibblers and so on.
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.
The way of cutting sheets with nibbler is to cut punches out of a tiny metal sheet and repeat the process until you get your desired dimension.
Cutting sheet metal with snips can be tricky and frustrating.
How to cut thin sheet metal and keep it flat.
Standard sheet metal is thin galvanized steel.
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.
