Ender 3 V3 KE Modular Dual 5015 Fan Mount - KeModBurner

The KeModBurner is an alternative extruder cover and fan mount for the Ender 3 V3 KE.

KeModBurner Features

Inspired by alternative extruder covers and fan mounts like the FatBurner (https://www.printables.com/model/887597-fatburner-ender-3-v3-ke-dual-5015-fan-cooling-syst) and ANOTHER 5015 mod for Ender 3 KE (https://www.printables.com/model/920563-another-5015-mod-for-ender-3-ke) I wanted to create my own cooling solution that should feature an easy way of trying out different fan duct designs.

With that in mind, I created the KeModBurner as a modular Ender 3 V3 KE extruder cover featuring:

• mounting of two 5015 radial fans,
• detachable and exchangeable fan ducts
• mirrored design, that means the distance of both fans to the nozzle is the same,
• easy mounting of fans and fan ducts by using M3S heat-set inserts.

There are two types of covers available, one with and one without additional guides for the fan cables.

If you don't want to use heat-set inserts, I also provide alternative versions of the cover with smaller holes that should fit M3 screws directly. Be aware that I did not test these variant. I personally use the version with heat-set inserts.

Currently, there are 3 fan duct designs available, I will probably provide more in the future.

For mounting the 4020 fan seen in the pictures I used the Ender 3 V3 SE 25-40mm fan bracket - Low profile (https://www.printables.com/model/718283-ender-3-v3-se-25-40mm-fan-bracket-low-profile)

Update 2024-09-21:

I added an acceleration sensor X bracket that can be used with the KeModBurner.

Update 2025-03-23:

As users reported that there is a conflict with the x-stop on some variants of the Ender 3 V3 KE, I added an additional variant of the cover that moved the fans 2 mm forward and has a cutout where the x-stop is.

Print Settings

I recommend using PETG filament. Both the cover and the fan ducts can be printed without supports if laid on the build plate as shown in the pictures below. I used the following settings:

• Layer height 0.2 mm
• Walls: 4
• Top and bottom layers: 4
• Infill: 15%

Additional settings when printing the fan ducts:

• An outer brim of 5 mm.
• Enable “Slow down for curled overhangs”

Printing orientation

Cover

Fan ducts

Bill of Materials

• Two 24V 5015 radial fans, I used the ones from WINSINN: https://www.amazon.de/WINSINN-3D-Drucker-Gebl%C3%A4seturbine-Turbo-Hydrauliklager-b%C3%BCrstenlose/dp/B079BPS9Q8/
• As the stock fans often don't have the correct connectors, you may need 1.25 mm JST 2 Pin connectors (https://www.amazon.de/dp/B06WGM9W7S) and solder them to the fans. Be aware that swapping of the cables may be needed. I had to connect red with black and vise versa.
• 8 M3S heat-set inserts (https://www.amazon.de/ruthex-Gewindeeinsatz-SHORT-Gewindebuchsen-Kunststoffteile/dp/B09ZHSGHXD/). Alternatively, you can use the “-no-insert” cover and screw the M3 screws in directly. I would recommend to use heat-set inserts.
• 4 M3x18 or M3x20 screws for mounting the fans. As the fan mounting holes are quite big, I recommend adding M3 washers for a better fit.
• 4 M3x6 or M3x8 screws for mounting the fan ducts.

Assembly Instructions

1. Use a soldering iron to install M3S heat-set inserts
   • On bottom side:
     
     
      
   • On left side:
     
     
      
   • On right side:
     
     
      
2. Plug 5015 fans into their sockets and lay them down on the heat bed.
3. Install cover on the extruder:
   
   
    
4. Screw the cover on the extruder with the original screws
   • Left side:
     
     
      
   • Right side:
     
     
      
5.  Mount the 5015 fans onto the cover using M3x18 or M3x20 screws. I also recommend adding m3 washers for a better fit.
   • On the left side:
     
     
      
   • On the right side:
     
     
      
6. If not done yet, mount the fan duct of your choice on the cover using M3x6 or M3x8 screws:
   
   
    
7. Have fun with the KeModBurner 🤓.