In rotary bearings, there are two basic types of bearing cage designs: crown and ribbon. Crown retainers feature a single-piece, open-ball pocket design. Ribbon retainers have a two-piece, open-ball ...

[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 ...