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Polar Moment of Inertia of a Circular Shaft Calculator






 

 


How This Is Calculated


$$ J = \frac{\pi \cdot d^4}{32} $$ where:

J   =   Polar moment of inertia   (m4)

d   =   Diameter of the shaft   (m)


Assumptions


  • The shaft material is homogeneous.
  • The material behaves elastically.
  • The loading is static.
  • There are no stress concentrations.


Related Calculators


Angle of Twist Bending Stress Deflection Under Load Natural Frequency for Torsional Vibration Power Transmitted Through a Shaft