Gizmag tells us about how a Japanese company, Coo Space, has developed an innovation in ball bearings that will allow the balls to automagically space themselves out. That will lead to vastly reduced friction which, in turn, will lead to the elimination of the necessity to grease the bearing to reduce the friction. This is potentially a huge development across all forms of industry.
The Autonomous Decentralised Bearing (ADB) puts a small indentation, or groove, into the outer bearing race. As the balls slide over this tiny groove, they slow down ever so slightly, and then speed back up. This does nothing to affect the bearing's regular performance, but if two balls are touching each other as they cross over the groove, the first ball's deceleration puts a tiny brake on the second ball, which separates the two as they go around the races.
It's an incredibly simple and tiny change, but it does a remarkable job.
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Without the need for a cage, you can run these bearings un-lubricated, and that's where the real performance benefits come in. Coo Space claims the ADB experiences as little as 10 percent of the friction of a regular ball bearing
Here is a YouTube video of the bearings spacing themselves out within the races.
(Score: 3, Interesting) by Immerman on Wednesday May 27 2015, @04:43PM
Consider that rolling "friction" is a misnomer, it's actually rolling *resistance*, and originates primarily from a variety of deformation effects which can be minimized by using sufficiently hard materials (and/or large contact surfaces). As such, so long as the loading is insufficient to cause notable deformations in the bearings or races, it can usually be ignored. And it won't be affected by lubrication.