The illustrations are for a small bracket but i have cut 3 foot.
Cutting aluminum sheet clean.
2 mark the start and stopping point of your cut.
If you use metal shears to cut thin sheet metal such as duct metal it curls and can be difficult to flaten properly.
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.
This jet of water eats away at the metal and leaving a clean smooth edge.
Probably the preferred method for cutting intricate or thick aluminum the water jet focus a very thin stream of water mixed with abrasives at extraordinary pressures and very high speed into the sheet metal.
Sheet aluminium can be cut without the need for a guillotine or tin snips which tend to deform the metal.
Clamp the aluminum down.
This weakens the aluminium and creates a fracture line.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.