Bondtech Kit for BCN3D Sigma

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Own a BCN3D Sigma?

Well, now for your convenience, we are offering a Bondtech kit for BCN3D Sigma! The kit includes two extruders (a left hand and a right hand), cables for plug and play and also our own design of mounting hardware. See twitter for ideas on how our friends have used them, or head on over to our blog post

The Kit includes 2 extruders, 2 cables specially made to suit the BCN3D Sigma and of course our own special design of extruder mounting hardware.

Get the installation manual here!


Own a BCN3D Sigma? Well, now for your convenience, we are offering a bundle for you!

The Kit includes:

  • A left and a right hand sided 3mm extruder
  • and of course our own special design of extruder mounting hardware.

Due to popular demand of our external mounting system and to save costs being passed on to you please print the bowden tube adaptor:

For external mounting: 

For internal mounting:

Long cables are needed if you plan to mount the extruders on the outside of the printer. If you wish to print your own external mounting hardware, let us know and we will send you a link to the files, they are free to our customers! We have expanded on the original design with a solution to those not willing to drill into their machines. You can of course buy the ready external mounting hardware directly from us here

Our kit has been especially popular with those interested in pushing their printers that bit extra.

You will need to change the steps per unit on in the Sigma to accommodate the new extruder gearing. Get the installation manual here!


Additional information

Weight 2.2 kg

4 reviews for Bondtech Kit for BCN3D Sigma

  1. 5 out of 5

    Chris Lee

    Transforms the Sigma to a real beast. No longer worry about lots of retractions causing grinding etc. Since fitting i have not looked back.

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  2. 5 out of 5

    jason (verified owner)

    I was having lots of failed prints due to retraction filament grinding with the stock extruders on my BCN3D Sigma. After installing these Bondtech extruders, my prints are coming out fantastic, they handle retractions with ease and no sign of grinding at all. The Bondtechs where easy to install, i took my time and it took around 30-40 mins to remove the old extruder and install the new ones. Highly recommended if you want to take your printer and your prints to the next level.

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  3. 5 out of 5


    Excellent kit from an excellent company. An employee went out of his way to help me with the installation of these extruders. The factory hotends for the original BCN3D Sigma (non-R17) were the primary source of many failed PLA prints, and were only sufficient for printing HIPS and Nylon. Even after a E3D V6 hotend upgrade, I encountered failed prints often as a result of filaments baking in the hotends during dual extrusion prints. These Bondtech extruders use an internal gear to run a secondary wheel along the opposing side of the filament; a feature I have not seen on other aftermarket extruders. The result is analogous to driving a 4WD car in the snow instead of a 2WD car – double the traction surface on whatever material one prints.

    Not only do I recommend this upgrade, but I highly recommend this company because of its outstanding support and dedication to educational outreach.

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  4. 5 out of 5


    this kit is perfect and change your SIGMA,
    this installation is plug’n’play
    at this price you have everything to install without any others buyings…
    concerning the “how to”, EMVIO made a perfect step by step’s manual…: PDF + videos of each step

    and if you still have problems?
    they are always there by phone, email or Facebook…. to answer to you

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