Minimalist Hardened Filament Spool Hub for threaded rod without bearing

Minimalist Hardened Filament Spool Hub for threaded rod without bearing. So you don't have to buy anything else, just print and use with M8 threaded rod. You can install easily because the trapeze form locking arm, but it holds the filament spool surely.
It prints for 40 minutes with Anet A2 Plus, 0,2 mm layer heigh, 0,4 mm nozzle, 100% infil, average 50 mm/sec speed.

UPDATE (01/02/2019): Dimensioning problem solved.