F = force (kN)
Preliminary press-brake air-bend force
Preliminary metric air-bending estimate with explicitly entered tensile strength, thickness, bend length and V-opening.
VERIFIED FORMULA RECORD
F = 1.42Rm t²L/(V × 1000)
Preliminary metric air-bending estimate with explicitly entered tensile strength, thickness, bend length and V-opening.
Variables and units
Rm = tensile strength (MPa)
t = thickness (mm)
L = bend length (mm)
V = V-opening (mm)
Conditions and limitations
- Air bending baseline only
- Straight uniformly loaded bend
- Tooling/machine charts control final selection
Source: Manufacturer press-brake engineering charts; the calculator labels this as a preliminary air-bend estimate.