Locating moment of inertia specifications for a given robot arm.
The moment of inertia for each robot arm can be found in the online manuals (link below). Under the Robots drop-down, under Robot Series > Specifications of the Robot Unit > Robot Specifications.
You can also find the moment of inertia formulas for end of arm tooling here:
https://www.fa-manuals.denso-wave.com/en/usermanuals/000846/