SubashchandraRaiG May 26, 2015 07:55 AM this is a 'revolution' in bearings Dziks May 26, 2015 07:59 AM brilliant! I must try to 3D print it. ElSmurf May 26, 2015 08:07 AM It's a beautiful thing to see such an old technology be improved upon by such a simple change. Fretting Freddy the Ferret pressing the Fret May 26, 2015 10:38 AM I reckon less noisy (computer) fans can be designed at higher rpm for starters. Bio mimicry of whale fins deliver more efficient fan blades, now this! Innovation never stops! Bob May 26, 2015 11:30 AM I'm not sold yet. This might work for very light loads but that little indent will be like a speed bump under heavy loads and may pound the bearing to failure. Old J Hawthorne May 26, 2015 12:28 PM Great…one step closer to perpetual motion…it's gonna happen! Stickmaker May 26, 2015 12:36 PM You're confusing plain ball bearings with caged roller bearings. One of the best claimants to inventing the latter is John Harrison, in the late Eighteenth Century as part of his work on accurate clocks. garrettholl May 26, 2015 01:06 PM Bob - they note in the top video at 2:15 (https://youtu.be/wN0vhXGVHnI?t=2m15s) that there is clearance between the decelerating/accelerating ball and the inner race. This simply drops the load of the affected ball and places it on to the two surrounding balls. Should be pretty smooth. Conny Söre May 26, 2015 01:29 PM I want those in my bike! I'm fully aware that the major resistance on that bike is generated by the weight and drag of my fat arse but still. If all bearings on that bike rolled like this I'm sure it would be a better ride. Mark Windsor May 26, 2015 01:45 PM To assemble a normal ball bearing traditionally is done by feeding the balls in between the races with the inner race eccentric to the outer race, allowing for a larger gap. Once all the balls are in place, the cage is fitted to space the balls evenly, which also brings the two races back to a concentric state. So, with this ball bearing, how do they assemble it? It looks like they have more than a normal number of balls in the bearing race.