Fan support 4 inch ducting
thingiverse
I made an enclosure for my Anet A6 and needed ventilation so I made a support to hold the fan and the 4-inch air duct. The part fits the crimped end of the air duct, increase the radius of the duct support if you want to fit the other end which has a larger diameter. As you can see in the picture I tried to screw the duct into the part made from PLA. I should have added holes in the part. The position of the 2.5" fan mounting holes are too far, edit them before printing. I added a low-cost PMW controller to adjust the fan speed.
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