Open Hardware 40mm Fan Cover

I needed hollow collars with the open hardware fan cover by Mak-a-face to insert screws into the top. Instead of redesigning the part to add collars, I separated them to print parts without any supports. The parts will join snugly once screwed into the fan. I used 2 x M3*5 screws and 2 collars on top to complement the bottom screws. The Anet A6 does not utilize the top screws in their top mounted extruder motor design.