Manufacturing and machining
Sheet metal bend allowance
Calculates BA = θ_rad × (Ri + Kt) for a bend angle measured from the flat state.
Related calculators
K-factor from measured BA
Solves K = (BA/θ_rad - Ri) / t from a measured bend allowance.
Sheet metal bend deduction
Calculates BA, OSSB, and BD = 2 × OSSB - BA for one bend line.
Flat length from tangent lengths
Calculates L_flat = L_tangent_1 + L_tangent_2 + BA without mixing outside flange dimensions.
Sheet metal outside setback
Calculates OSSB = (Ri + t) × tan(θ/2) for two outside flanges.
Material roll length and mass
Calculates length, outer diameter, turn count, and mass from the winding volume equation.
Measured springback
Describes measured springback from loaded and released angles; it does not predict material behavior.