This is a print in place fridge magnet I made for my daughter to play with. It should print in one piece, and once you remove the supports, it should spin freely. I had to use a little sandpaper to get enough clearance to really get it to spin, but it seemed to work.

This is designed to embed a small magnet in the based on the piece, roughly 5mm diameter by 3mm thick. I set my printer to pause at the correct layer height so the magnet hole was still open, and I could place a magnet inside. After that, I had the printer resume, and it printed over the top of the magnet, sealing it in.

Usage: https://youtu.be/UuUJaFBQPIY

Print instructions

Licence: Creative Commons - Attribution Category: Kitchen & Dining Print Settings

Printer Brand: Prusa

Printer: i3 MK3

Rafts: No

Supports: Yes

Resolution: .2

Infill: 15

Filament: Protopasta HTPLA Gunmetal
Notes:

When generating support, it needs to be only support coming from the bed. If it's anywhere else, the gear won't spin!