This weakens the aluminium and creates a fracture line.
How do you cut aluminum sheet metal.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
Clamp or hold a straightedge or square along the cutting marks and score a line with the tip of a sharp utility knife blade.
Cutting aluminum sheet metal with a hammer and chisel is relatively straight forward line up the edge of the chisel along the line you wish to cut and strike the chisel with a hammer.
Step 2 hold a magnet up to the sheet metal to determine if it is steel or aluminum.
Choose a saw with a tooth number of at least 24tip teeth per inch to ensure even cuts in the metal.
Draw a line down the length or width of the sheet metal using a pencil to mark the cut line.
Add 1 drop of 30 weight machine oil to the chisel s edge for lubrication.
Put on a pair of work gloves before you wax the saw to protect your hands.
You should be able to cut your aluminum metal piece within 30 seconds.
Using a softer piece of material such as wood as a backer will allow the chisel to push through the metal and prevent wear on the chisel s tip.
You can cut corrugated metal both parallel to the ridges as well as across the ridges.
To cut the sheets of metal rathe.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
Then bend the sheet back and forth a few times to snap it.
This makes it easier for your chisel to get into your aluminum s hardened grains of metal.
Cutting straight lines with an electric saw.
2 x research source.