How To Hem Sheet Metal With A Brake

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.

How to hem sheet metal with a brake.

A slitter is mounted only after a sheet is locked in place. Place the acute bend under a flattening bar and apply enough pressure to finish closing the bend. I built some custom doors for a bike shed. Lock the sheet in place.

Create a bend with acute angle tooling in the metal 30 is preferable but 45 will work for some circumstances. When working with a brake press hems are always created in a two step process. I wrapped them in metal for durability and in this video i show how i bent the trim coil used on those doors. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube.

Mount the slitter on top of the brake. Insert the 6 in wide sheet 1 2 in. If the sheet metal is very thin you can instead flatten the hem under the clamping bar. To establish the inner smaller radius 90 degree bend line subtract half a bend deduction from the outside dimension of the flange.