What the Ratings Mean for Fit
The R88M-KH2K020F-S1: The G5 High Inertia designation tells you this motor has a larger rotor inertia than a standard G5 servo of the same frame size. That extra inertia smooths out load disturbances and reduces the gain tuning effort on high-inertia mechanical systems — think a rotary table with a heavy fixture or a belt-driven axis with a long, heavy payload. It is not the right pick for a low-inertia, high-acceleration pick-and-place arm where a standard-inertia or low-inertia rotor would be a better match.