4020 blower to 40mm (4010) fan adaptor

cults3d

I have a stash of 4020 blowers that I found to be quieter than my 4010 fans. Additionally, they tend to flow better when there's a restriction because blowers maintain pressure better than fans. Since I couldn't find an adapter on Thingiverse, I made one myself. The part where the blower attaches is from another design that I'm planning to upload in the future. The blower slides smoothly into place with the mounting tab fitting snugly within a recess and the guides on the opposite side fitting onto the inside of the blower. These guides keep the blower from wobbling since it's attached by only one screw, and they also reduce air leakage from the high-pressure side back to the low-pressure side of the squirrel cage at least for the small portion it covers. If you experience noise when assembling it, please make sure that you don't have over-extrusion on the guides going into the blower. Sand them down if you do to make it smooth and provide clearance. Also, ensure that the blower is pressed onto the adapter completely. I uploaded two versions, one with a recess for a 3mm socket head cap screw and the other with a recess for a 3mm nut. Either will allow you to use a 20mm screw. The version in the picture doesn't have the recess, so I had to use a 25mm screw that's sticking out on the other side. Edit: Initially, I mounted the fan with a horizontal axis but rotated it so it had a near-vertical axis with the intake on top and it seems to have reduced noise in the room even further. I've uploaded more pictures showing it in both orientations on an Ender 3.