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Mini spool for wire or whatever. — image 1
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Mini spool for wire or whatever.

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Model information

Category
Electronics
License
Creative Commons — Attribution

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