Nema 17 Filament Spool Holder

This spool holder is designed to fit on the top of the Nema 17 motors for the Z-axis on some printers such as prusa mendel i2. Now including a spool clip to prevent de-spooling. Clip fits Quantum3d spools and fits 3DMakerworld spools decently. I am using four clips per spool.

I used:
1 - 5/16 x 1 inch bolt
1 - 5/16 nylon locknut
1 - 5/16 washer
1 - 608zz bearing