One potential problem I see with the manufacture is how do you get the roller assembly inside the outer-sleeve?
Forcing it in with a hydraulic press could cause latitudinal slippage of the belting on the rollers.
The outer-sleeve could be formed by sticking two halves together around the...
Browsing around on Wikipedia, I found a novel design for rolling element bearings: http://en.wikipedia.org/wiki/Scrollerwheel
Anyone familiar with them?
