Manual brake setup and operation · Lesson 2 of 4

Manual brake setup and operation: materials, standards and design constraints

Why capacity changes with the metal, how thickness sets the setback, what drives springback, and the limits of the machine and the coating.

You will be able to: Read a brake's capacity for the metal in hand, size the setback from the thickness, and allow for springback, machine limits and the finish.

7 min · 9 slides · 5 questions

All lessons in this module

Slide 1 of 9

Capacity depends on the metal

Baileigh rates the BB-4012F for 12 ga mild steel but only 16 ga stainless steel.

Its ratings assume a tensile strength of 64,000 psi for mild steel and 100,000 psi for stainless. Tennsmith gives 16 ga as the stainless equivalent of its 12 ga mild steel rating.

Sources

Box and Pan Brake, Model BB-4012F - operator manual, Edition 2 (06/2024) - Baileigh Industrial (copy hosted by Purdue University, MECL)
HBU48-12 and HBU72-16 floor model box and pan brake - operating manual - Tennsmith Inc. (copy hosted by Conklin Metal Industries)

Glossary

Capacity: The heaviest material and longest bend a brake is rated for, given by its maker for a stated material.
Clearance: Tennsmith's word for the setback between the nose bar and the clamp block edge.
Springback: The angle a bend opens by when it is released, as the metal tries to return to its original shape.
T-bend guideline: The manufacturer's guidance on how tightly a painted sheet may be bent; Sheffield ties following it to keeping the warranty.