3D Print Your Own Fidget Spinner

Being a programming librarian basically means that we have to always be ready for the next trend. Last summer it was Pokemon Go and this summer it has been fidget spinners. How can libraries capitalize on the fidget spinner craze before they go out of style? 3D print them.

Disclaimer: this program was created a facilitated by my co-worker Elise and I was a mere helper.

SUPPLIES

3D printer
Computer
Ball Bearings
Isopropyl alcohol

PREP

Elise began by determining the dimensions of the center ring (where the ball bearing sits). We have a Lulzbot Mini and we use Cura to print. The center ring dimensions are: 24.5×24.5×8 (circumference-24.5 and height-8).

If you are using a different printer, you can use the dimensions of the ball bearing you purchase and go from there. We ran into issues with this method because Cura changed the dimensions when it printed. We don’t know why and poor Elise had to print about 8 rings until she found the correct dimensions.

Soak your ball bearings in rubbing alcohol to clean them. A clean bearing spins better.

PROGRAM DAY

Before the class began, the teens were told that their spinners would not be printed by the end of program. We had teens write down their address and they were told that their spinners would be mailed to them the following week. This eliminates the highly likelihood of them coming into the library every hour asking for updates.

We use Tinkercad to teach the basics of 3D printing design. All attendees who have never 3D printed had to take six basic lessons on Tinkercad.
Next, we had teens begin with the ring shape and had them change the dimensions to 24.5×24.5×8.
Teens were then instructed to design around the center ring.
Tips: Everything must be the same height and touching.

COMPLETION

We were able to print two spinners during the program. Teens used a hammer to secure their bearing.
We informed teens to apply grease to get a longer spin.