What this calculator does
Wire diameter, mean coil diameter, active coils, initial tension, and two working deflections define the linear body characteristic. Typical uses include return springs for flaps or actuation mechanisms.
Springs · tensile loading
Extension spring calculator to EN 13906-2
Calculate rate, forces, spring work, and body shear stresses for a cold-formed cylindrical extension spring including initial tension.
EN13906-2
02
Results
ƒ(x)
Set the inputs and run the calculation.
What still needs checking
Spring hooks are often more critical than the spring body and are not verified here. Dynamic loading also requires hook transitions, stress range, material diagrams, and manufacturing effects to be assessed.