by Robo, published
There is a major design flaw: the rolls tend to turn. However it seems to run much smoother than the gear bearing.
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This could work nicely if the rollers were hourglass shaped and the center and outer rings were formed to accommodate.
I once experimented with cages a bit (in conical roller bearings), The main problem was that their minimal printable size made the whole bearing too large. Also printing the tiny rollers separately turned out to be to be tricky.
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