Related Resources: spring material

Torsion Applied Spring Stiffness Constant Equations and Calculator

Machine Design and Engineering
Spring Design and Engineering
Vibration Engineering and Design

Torsion Applied Spring Stiffness Constant Equations and Calculator

Torsion Applied Spring Stiffness Constant Equations and Calculator

kt = ( E d4 ) / ( 64 n D )

kt = Spring Stiffness (lb-in / rad)
d = Wire Diameter (in),
D = Mean Coil Diameter (in),
n = Number of Active Coils,
E = Young's Modulus (lb/in2)

Reference Harris, Shock and Vibration Handbook