My friend Scott managed to blow up the inner disk of a rotary disc sander. The challenge is to replace it with a 3-D printed part. I’m guessing the probability of success is very low. A lot of effort went into shock mounting on the original, and a printed part will be brittle. Also it will be a thermoplastic, so it won’t tolerate a lot of friction heating.
The original soft material tore out. That was backed up by a fiberglass insert
Need to see how it holds up on a real job. The good thing is that we can always make these by the batch!