Also linked through the MEDIA tab on the menu bar.April’s Bending Basics column: “The four pillars of press brake tonnage limits” from The Fabricator magazine is now available for reading at theFabricator.com

Also linked through the MEDIA tab on the menu bar.
One of the best I’ve written on the subject of calculating and applying tonnage:

What tonnage is required?
Will my tooling handle the load?
Will I sink my tooling onto the machine?
Will my brake handle the applied load at center-line?
Something, operators and engineers should both know how to deal with.