608 Bearing BB

Yet another 608 bearing. 11 4.5mm (.177 caliber) BB's fit inside. After 5-6 BB's are added, align and use the little channels to force in the rest. I use the the butt of a screwdriver or large pliers to force them in part way then rotate the bearing to seat the BB in the raceway. Naming convention: raceway_offset-3.85mm_raceway-InnerRadius-2.3mm_OuterRadius-2.275mm

Relatively tight clearances but very free and smooth movement. I've used them in fidget spinners and my spool hubs.

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