Summary

Just a bunch of fidget spinners for 1/2" nuts. Use 608 bearings (ceramic if you can afford them). I would also recommend printing out some caps for the bearings. There are plenty already on Thingiverse for you to use. I use the ones from Lucina's designs, they work great (http://www.thingiverse.com/thing:2108154/#files).

Print Settings

Printer Brand:

Wanhao

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Wanhao Duplicator i3 V2</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>I mainly use 0.2, but 0.1 works just as fine.</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>15 to 20 %</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>A pretty easy print</p></div>

Fidget Spinners | 1/2" Nut and 608 bearing