Formbot Raptor 4040 Spool Roller w/608 Bearings No Bolts
thingiverse
Adjusted the arcs on the top to be lower so it wont touch the filament on heavily loaded spools also made the walls of the bearings slightly thicker and added a plate so you can mount on top of a Formbot Raptor or other big printer with 4040 extrusions on top. You can use it with 2020 extrusions but the plates will overhang a bit. You still need some way to mount the rollers on top. T nuts with thumb screws would be perfect. My advice is to slightly heat up the plastic when inserting bearings with PLA GREAT DESIGN BY THE AUTHOR !!!!!!
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