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Torsional Stiffness Hollow Shaft Equations and Calculator

Machine Design and Engineering

Torsional Stiffness Hollow Shaft Equations and Calculator

Angular Natural Frequency Three Masses Axial Equations and Calculator

kt = ( π G Do4 - Di4 ) / ( 32 l )

Where:

kt = Torsional Stiffness of Shaft ( lb-in/rad ),
G = Modulus of Elasticity in Shear (lb/in),
l = Length (in),
Do = Diameter Outer (in),
Di = Diameter Inner (in),

Related:

Reference Harris, Shock and Vibration Handbook