Ender 3 Fan Shroud for 4020 Fan - No fan guard
thingiverse
<b>Edit 11-07-2020</b>: Some users had trouble slicing. I noticed a mesh error and fixed it now. I remixed jass_on's design, removing the grill/guard portion and increasing the hole diameter slightly. This makes it quieter as air can move more freely. Since I'm using an enclosure, there's no risk of something getting stuck inside. And even if you accidentally touch the blades, they won't chop your finger off! I'm running a Sunon MF40202V2 fan in this setup.
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