[RimstarOrg] has brought us an oldie but goodie this week. He’s built a ball bearing motor, a design which has been causing engineers and scientists to squabble for decades. [RimstarOrg] used a ...

Rather, the bearing races — the bands or tracks in which the ball bearings sit and spin — begin to degrade, causing metal flakes to gunk up the grease. Regardless of the reason, a wheel ...