Mini spool for wire or whatever.

This is a small, 80mm diameter, 35 mm deep spool that I use for antenna wire, but I'm sure has many applications. If your printer bridges well, you can print it without support. The interior pocket uses a bridging trick to support the center hole. You can use a screw and nut to hold it together or glue it. There's key pockets to align the shaft when you assemble it.
Tutorial on the bridging trick I did is linked here.
https://youtu.be/kx0dbsSXg7Y