Ender 3 4010/4020/5015 Fan Mount and Duct
Main Cooling Fan Mount
This part is based on the stock fan cover, but allows the use of a 4020 axial fan on Ender 3 and maybe other Creality printers for heatsink cooling. If using a 4020 fan it must mount on the outside. A 4010 fan should work mounted inside, but I haven't tried it. You can use the stock part cooler or the 5015 bracket and duct with this part (see below).
- The stock heat sink cooling fan or another 4010 or 4020 axial fan. (The Ender 3 fans are 24v.)
- 2-4 M4 x 15-25mm screws depending on your fan size for mounting the fan. (I only use 2.)
- 4 M3 x 8-10MM screws.
- The original 2 M3 fan cover mounting screws or 2 more M3 x 6mm. If using a socket cap screw for the top bracket slot, a small washer may be needed.
- The original 4 part cooling fan screws or 4 M2 socket cap screws. I believe the stock screws are 2 8mm at the top and 2 10mm at the bottom (where the duct mounts).
Parts to print:
- bracket_top_v2.stl or bracket_top_no_slot_v2.stl
I designed this in multiple parts to avoid the need for supports. Print with the fan intake hole down. Be sure to print the left bracket with a flat side down. The non-slotted top bracket can be substitutted for the slotted version. The slotted version provides a bit of adjustment if the fan mount tilt.
- Mount the top bracket to the fan housing using 2 M3 screws.
- Mount the left bracket to the fan housing using the 2 stock M3 cover mounting screws or your own M3 screws.
- If the screw holes are tight you may get bulges around them where the housing mounts to the metal bracket. If so, trim them and any other bumps using a razor of a file, so that the housing will mount flush with the metal plate.
- Do the following 2 steps in whatever order works best for you. I Installed an inline connector for my 4020 fan, so I install it first and then plug it in as the last step.
- Mount the fan to the fan housing. Make sure it is oriented so that it blows inward.
- Mount the stock part cooling fan (don't forget its 90° duct) or the 5015 fan duct to the right side of the fan housing.
- Mount the fan housing using M3 screws.
5015 Bracket and Duct
This part should also work with the stock metal fan cover.
- A 5015 centrifugal fan. (The Ender 3 fans are 24v.)
- 3 M2 screws (I used the screws for the stock part cooling fan for this).
- 1 M3 x 6-8mm screw if using the optional bracket.
Parts to print:
- 5015_duct_v2.stl or 5015_duct_v3.stl
- 5015_lower_duct_v3.stl or 5015_lower_duct_v3_mod.stl if using duct v3
5015_lower_duct_v3_mod.stl hangs lower and also angles the air a bit lower.
No supports are needed for the main part. The optional small bracket should be printed with supports and oriented with the slot facing upwards.
- If you are using the printed main cooling fan mount, assemble it first as per above, but do not mount it to the printer.
- Mount the duct to the right side of the main cooling fan box using 3 M2 screws.
- Mount the entire assembly to the printer.
duct_bracket_v2.stl is an optional bracket that hooks to the hot end mounting plate. It gives the entire assembly a bit more stiffness. It won't work with the stock metal fan housing and would probably offer little to no benefit anyway.
40_intake.stl and 50_intake.stl are optional intake ducts. They may reduce the amount of random plastic scrap getting sucked into the fans.
Version 3 Duct
Version 3 of the 5015 mount and duct uses a separate lower duct that snaps in using a dovetail joint. It may provide better airflow. Step files are included if you'd like to make your own modifications.
Only the optional items need to be printed with supports.