This is a small bead spinner. Requires two small bearings. One 626 (6x19x6) and one 623 (3x10x4). The larger of the two bearing goes on the bottom, and the smaller goes on the top to stabilize.

If you print this and you can't find the bearings anywhere, I can sell you a pair (one each 626 and 623) for $5.00 USD plus shipping. You can also purchase them on Amazon and E-Bay.

At some point I may try to make a design that uses the printed bearings.