How to use
Enter thickness, inside radius, K and the angle rotated from the flat sheet. A right-angle bend uses 90°; the inside included angle is 180° − θ.
Example calculation
t = 2 mm, R = 2 mm, K = 0.4, θ = 90° → BA ≈ 4.39823 mm; BD ≈ 3.60177 mm.
Calculation method
BA = θπ/180 × (R + Kt) SB = (R + t) tan(θ/2) BD = 2SB − BA
Calculation limits
Ideal single bend; 0.1–179° and K from 0 to 1. Springback, tooling and actual material behaviour require a trial bend.