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Mass Moment of Inertia

Mass Moment of Inertia

Mass Moment of Inertia

(OP)
I found a couple old threads on this topic:
thread820-140933: Rotation Inertia
thread407-23283: Moment of Inertia

Neither seemed to answer the question regarding what GD2 vs. WR2 mean.

The best answer I have found is that GD2 is what mass moment of inertia is called in SI units and it would typically have units of kg*m^2. WR2 is used to designate imperial units and would typically have units of lbf*in^2 or lbf*ft^2.

There is an excellent link here: Link that goes further into the subject.

Be careful when trying to convert between them as I think the old threads erroneously give a conversion between the two. It is obviously highly dependent on which units you pick!

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