This project uses no castings. It’s a welding project using standard structural steel and common hardware items to build a compact portable bending brake.
It’s a 15″ brake as detailed but you can scale up or down in size within limits. Definitely not a heavy duty brake but you can make neat bends in 26 gauge metal to form ducts, boxes, drawers, belt guards, and dozens of other items for your shop projects.
Some have beefed up the leaves and pivots so that metal as heavy as 20 gauge can be bent sharply.