Torsion Spring Calculator

Calculate torsion spring rate, stress, and deflection for helical torsion springs used in mechanisms.

Diameter of the spring wire.
mm
Average coil diameter.
mm
Number of active coils.
Torque applied to the spring.
N·mm
Spring wire: 207 GPa.
GPa

Results

Spring Rate-N·mm/rev
Angular Deflection-degrees
Bending Stress-MPa
Spring Index-
References: SMI Spring Handbook; Shigley's Ch. 10 — Torsion Springs