Creality Ender 3 V3 SE modular 5015 part cooler holder and duct

This is a minimalist and modular holder and duct for replacing the stock shroud and fan with a 5015 blower as a part cooler. It is compatible with 40 mm hotend fans, and adapted for the stock hotend and nozzle.

Updates

• 2025-08-30
  Added Holder 2-point R which only attaches to the extruder backplate, and not the extruder motor, for those who don't have that option. Slightly less weight.
  Renamed Holder 4-point R and Duct Standard R. Reuploaded all, properly oriented.
• 2025-08-02
  First published.

Introduction

This solution consists of:

• A holder that mounts a 5015 blower on the right hand side of the extruder backplate (reuses two screw holes used by the shroud). Two options are offered:
  • Holder 4-point R for printers with screw holes on the right hand side of the extruder motor. This option also requires printing two spacers (Extruder spacer).
  • Holder 2-point R lacking the provisions for securing the holder to the extruder motor, for those without screw holes on the right hand side. (This option does not require the spacers.)
• A duct Duct Standard R directing the air at the nozzle.

The modularity of it consists of the possibility to redesign the duct and replace it without replacing the holder. There is no need to remove the blower to change the duct, only to loosen it temporarily. Part of the rigidity of the construction comes from the blower being mounted with both screws as well as being held in place by the duct inlet.

Tested against a Sunon MF50152VX-1L02C-A99 but should work with any 5015 blower with a similar outlet and body thickness. The outlet of the duct measures 47 x 6 mm and the area 176 mm², which is ¾ of the typical blower outlet of 234 mm².

Bill of materials

• 4 x DIN 934 M3 nuts (holding duct and blower)
• 2 x countersunk DIN 965 M3 x 6 screws (securing the holder to the extruder plate)
• 2 x countersunk DIN 965 M3 x 10 screws (only required for Holder 4-point R)
• 2 x M3 x 20 screws (securing the blower to the holder)
• 2 x M3 x 12 screws (securing the duct to the holder)

Printing settings

PLA+ should work well, but consider PETG if warping occurs.

Holder 4-point R / Holder 2-point R

Print time is 00:50 and weight 5 g including supports (for the recessed nuts). Take care to orient the holder according to the image, or you're going to get a lot more supports and an uglier outwards facing surface.

Extruder spacer

(Only needed for the full size Holder 4-point R!)

Two of these are needed, to secure the holder to the extruder. Enable ironing to get a good level top surface.

Duct Standard R

Print time is about 01:15 at the recommended settings below. The model is made to be printed upside down, producing a massive overhang that needs to be supported. Total weight with support is 8 g.