How To Hem Sheet Metal With A Brake

Mount the slitter on top of the brake.

How to hem sheet metal with a brake.

A slitter is mounted only after a sheet is locked in place. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Insert the 6 in wide sheet 1 2 in. Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances.

I wrapped them in metal for durability and in this video i show how i bent the trim coil used on those doors. I built some custom doors for a bike shed. If the sheet metal is very thin you can instead flatten the hem under the clamping bar. Lock the sheet in place.

Place the acute bend under a flattening bar and apply enough pressure to finish closing the bend. Start by bending your metal to 135 degrees and then flatten a hem against the top of the clamping bar using the apron all the way against it. To establish the hem bend line add the two outside dimensions up to the hem then subtract half the hem elongation allowance and a full bend deduction for the inner 90 degree bend. To establish the inner smaller radius 90 degree bend line subtract half a bend deduction from the outside dimension of the flange.