I assume you mean rolling element bearings (balls or rollers made of Silicon Nitride or some similar ceramic). If so the losses would be closely approximated by the same size bearings in a normal metal - M50, 52100, 440C, whatever. Most of the losses are tied up in windage, drag, etc, much...
Anyone have any experience with high speed differential epicyclic gearsets? We've done some work with speed reduction planetarys but always with the ring or carrier fixed. I'm looking for any practical lessons learned with making high speed differentials work. Thanks!
