I stumbled across an harmonic drive that I thought might make a decent
4th axis gear reduction for setting up a chuck . More of an automated indexer than anything else. The problem is I don't understand how you connect it up. The front (one side) has a flange set in a seal with some bolt holes that clearly is intended to rotate. The rear (other side) just has a large greasy hole. At the bottom of the hole is what appears to be six small bolt heads. I feel like there is something missing.
I'm not ready to tear it apart just yet. From what I have seen reading about harmonic drives it might be tricky to reassemble.
Fanuc A290-7215-V513
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Whatever I have I am pretty sure is missing something. Driving the front (or the rear) is 1:1 with the opposing side. Seems like the rotational part may just be one piece.