Filament spool holder with used HDD motor

This is the coil attachment on 3030 Aluminum extrusions of the 3D printer. You need one used hard disk motor, M3, M4 screws and T-nut M4.It's easy to install and strong enough to hold 1kg's filament spool.

If you want, you may print T-nut M4 with your printer.

You may update it for 2020 or other size of Aluminum extrusions.