90 Degree Fan Duct for 120mm fan

thingiverse

UPDATE: Added shorter version of Duct 2 UPDATE: Added shorter version of Duct2 This is a fan duct designed for pass-through air, suitable for both intake and outlet applications. I envision it being utilized in various contexts. There are two designs available. Duct V3 is the first one I designed and is displayed on my print stand. The second design is the one I plan to print later once I obtain a Noctua fan because it looks more appealing. Duct V3 features two holes that align with a 120mm fan, along with countersink holes. There are no obstructions in the airflow path of the aperture. Duct2 V2 has four counterbored 4mm cap screw clearance holes that line up with the 120mm fan bolt pattern at 105mm apart. It features protrusions at the aperture to facilitate hole alignment, and I believe this will not be a problem. This design is cleaner from the outside and stands 40mm tall. Duct2Short is identical to Duct2 but stands 36mm tall. Why did I create these designs? I want my TMC2208s to remain cooler on my MKS Gen L. I reversed my board cooling fans to avoid drawing air from under the hot build plate. Instead, they pull warm air from the top of the enclosure and draw in cool air from the side underneath the Y-axis extrusion. I used a 4-inch hole saw to cut a hole in the platform of my printer stand (a future enclosure once I can afford plexiglass). This allows air to be blown into the vent holes under the Y-axis Extrusion in the factory box, as well as under the board housing. I'm utilizing a Noctua noise reducer to slow down the fan speed but plan to use a PWM controller for the fans eventually.