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Second nozzle for k8400 - vertex 3d printer

Velleman K8402: Dual Extruder Upgrade Kit for K8400 Vertex 3D Printer

Velleman K8402

3D Printer Dual Extruder Upgrade Kit for K8400 Vertex 3D Printer

Upgrade your Velleman K8400: Vertex 3D Printer Kit into a Dual Extruder 3D Printer by adding a 2nd extruder nozzle. The K8402 upgrade kit comes with all the hardware you need to convert your single extruder Vertex 3D Printer into a dual head/color machine, allowing you to add a second color filament to your 3D printed projects without switching out filament rolls mid-print.

Expand your printing possibilities and project colors. Code which nozzle you'd like to use or switch to within Slic3r, Sketchup or your preferred 3D printing tool. With the K8402 and the K8400 firmware update, your K8400 Vertex 3D Printer will automatically switch and heat the corresponding nozzle and continue printing.

Please Note: If you’ve been using your Vertex K8400 as a single extruder, you will need to update the Vertex 3D printer dual head firmware. The K8402 Dual Extruder Upgrade Kit is ONLY compatible with the Velleman K8400: Vertex 3D Printer Kit.


  • Allows you to print with 2 separate filaments on your K8400 3D printer
  • Heating indicated per nozzle on standalone controller / Repetier Host

What's Included?

  • 0.35mm Nozzle Extruder
  • Stepper Motor
  • Driver for Plug-In Stepper Motor
  • All necessary hardware


Nozzle Diameter 0.35mm
Space Between Nozzles 23.7mm
Maximum Nozzle Operating Temperature 270°C
Filament Diameter 1.75mm (accepts all filament spools with a mounting hole = 53 mm). Open filament policy.

Additional Information

Difficulty Level 5


Vertex 3D printer firmware single head M1-V1-H1
Firmware for the Vertex 3D printer with one nozzle. Version M1-V1-H1.

Vertex 3D printer firmware dual head M1-V1-H2
Firmware for the Vertex 3D printer with dual nozzles. Version M1-V1-H2.

Info Sheets

Resistor colour code

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

Product Information

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product