MIT-developed 3D printer can output a fully functional electric motor in a single process — team only needed to magnetize the linear motor after printing, motors cost just 50 cents each

3D printer with four extrusion heads
(Image credit: Cañada, J., Bigelow, Z., & Velásquez-García, L. F. (2026). Fully 3D-Printed electric motor manufactured via multi-modal, multi-material extrusion. Virtual and Physical Prototyping, 21(1))

A team of researchers from the Massachusetts Institute of Technology (MIT) have developed a 3D printer that is capable of printing a fully functional linear motor in just a few hours. According to the paper published on Virtual and Physical Prototyping, the device is equipped with four different extruders — a filament extruder, a pellet extruder, an ink extruder, and a heater — and outputted five different materials — dielectric, electrically conductive, soft magnetic, hard magnetic, and flexible. The team aimed to build a multi-model, multi-material extrusion 3D printer that can build an electric motor with as few steps as possible.

When using traditional methods, building a one-off prototype can take several weeks to half a year, especially if you need custom tools and equipment. But with this new 3D printing method, you can cut that down to just one day. The researchers also mentioned that it’s useful for making replacement parts, especially for items that aren’t readily available locally. So, instead of relying on a global supply chain that would take weeks to months to deliver, especially with disruptions happening worldwide, you can just find a schematic or diagram of the item that needs replacement (or even build one yourself) and print it as needed.

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“This is a great feat, but it is just the beginning. We have an opportunity to fundamentally change the way things are made by making hardware onsite in one step, rather than relying on a global supply chain. With this demonstration, we’ve shown that this is feasible,” Dr. Luis Fernando Velásquez-García, one of the senior authors of the research paper told the publication. He later added, “Even though we are excited by this engine and its performance, we are equally inspired because this is just an example of so many other things to come that could dramatically change how electronics are manufactured.”

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Jowi Morales
Contributing Writer

Jowi Morales is a tech enthusiast with years of experience working in the industry. He’s been writing with several tech publications since 2021, where he’s been interested in tech hardware and consumer electronics.

  • Sam Hobbs
    How much does such a device cost, or will it? How does that compare to the cost of manufacturing the motors using traditional technology? This will likely be useful for custom-made motors but can this be cost-competitive with traditional technology for mass production?
    Reply
  • Edric26
    This is awesome, but if the new legislation meant to stop people from 3d printing guns kicks in it's going to squash this sort of innovation.
    Reply
  • timsSOFTWARE
    Edric26 said:
    This is awesome, but if the new legislation meant to stop people from 3d printing guns kicks in it's going to squash this sort of innovation.
    I don't know how they would ever be able to stop people from 3D printing guns - is the legislation banning building your own 3D printer? I would assume people who want to print that kind of stuff illegally will go low-tech on the printer side with DIY options, or hack/jailbreak the hardware/software.

    The obvious application for this type of thing is printing complete units - useful for robotics, etc. - moving toward the sci-fi version where someone resin-prints a whole robot body/it arises from a vat. It may not be more efficient from the standpoint of building the motor itself, but it may be more efficient from the perspective of being able to build the whole assembly in one-shot. And in that future, replacement may be favored over repairability.
    Reply