When you release the handle the bent material will spring back to 90 not 85.
Bending sheet aluminium at home.
Shaping small pieces with an arbor press.
If you re bending 0 020 thick material use a 0 020 radius.
In other words if you re bending 1 8 sheet use a tool with a 1 8 radius to form the inside of the bend.
The idea of adding an angle 5 degrees past 90 is so that you can bend past 90 to allow for the spring back.
Monkeys spinning monkeys by kevin macleod.
Say you re bending 0 25 in thick 6061 t6 aluminum to a 100 degree external angle 80 degree internal angle.
Bending sheet aluminum with a bending brake.
You d probably air bend by using a 3 0 in.
For most applications with stainless steel or aluminum you can get away with a zero radius bend on anything under 0 050 thick.
Purchase a metal bending brake online or at your local.
The two m10 bolts in the top are to clamp the sheet between the backstop and the base.
How to bend aluminum method 1 of 3.
Step 1 determine the angle at which you want to brake the metal and mark it on the protractor.
To make this easier you d start with your 6061 material in the soft t 0 state.
Metal shops have brakes mounted at different angles with automated braking arms however it is possible to bend sheet metal at home without the use of a brake.
Die opening with a relieved profile.
Bending a brittle metal beyond its limits could cause the metal to snap and break.
Buy or rent an arbor press online or at your area home.
As an example if you want to bend 24 gauge sheet metal at a 90 angle the calculation would be.