Use scissors to cut the foil into a large circle shape.
How to bend aluminum sheet into a circle.
Mark the bend point at 2 and inches with a chisel and bend both sides of the holder down using a piece of 2x4 to help keep the bend even.
Some over bending is usually needed because the extrusion will exhibit a degree of spring back.
Then place the clamp bar back down on top of the aluminum crosswise.
After you bend both sides the length of the roller holder will be inch longer than the longer rubber part of the two bottom rollers.
Lift the clamp bar away from the rear of the brake frame and slide the sheet in perpendicularly to the direction you want to bend it.
Insert your aluminum sheet into the brake beneath the removable clamp bar.
Mark your bend lines.
To do this the extruded section is wrapped around a die.
Make sure the bar is seated firmly inside the frame.
Take a piece of metal pipe on a hard surface and roll it over the sheet metal strip as you work it circular by pulling up on it.
The five most common methods of bending extrusion are.
Then use your bend allowance to draw your second bend line the intervening distance between your bend lines bend radius.
Be careful not to bend or damage the aluminum foil in the process.