You walk to the brake department, where you see piles of work-in-process. Stacks of panels of multiple thicknesses sit with an acute bend near one edge—a hem, half formed. At the brakes, you see ...

I will show you how I made Sheet Metal Bender Machine in my Meanwhile in the Garage workshop, This sheet metal bender is constructed from I-beam, pipe, bearings, steel plate, threaded rod, nuts ...