exiii hackberry, an open sourced 3D printed bionic hand
exiii hackberry, an open sourced 3D printed bionic hand
may 29, 2015

exiii hackberry, an open sourced 3D printed bionic hand

exiii hackberry, an open sourced 3D printed bionic hand
all images courtesy of exii





japan GOOD DESIGN award: 3D printing is a technology that is constantly improving, but as time goes on, the groundbreaking advances fall to a level which allow for the adoption of it accessible to the masses. for one japanese company called exiii, the 3D printing landscape has helped them to create an electric hand called ‘hackberry’.  the name represents a vision to ‘hack’ at problems, and to grow branches that reach out to users. not only is it more functional than prosthetic hands from a ten years ago, but is also optainable at just a fraction of the price.


a user demonstration of the hackberry
video courtesy of exii





using a smartphone as its computer, and 3D printed parts for much of the hardware, the company recently declared that the bionic hand will be open sourced to speed up the development through cooperators from all over the world. exiii hopes that by making the blueprints and source code freely available, it will amass huge attention from developers, designers and artificial arm users, utlimately leading to faster leaps in innovation. 



much of the hardware is 3D printed





already the exiii ‘hackberry’ has an assortment of new features compared to its ancestor, the ‘handii’. it has a more flexible wrist that enables for more variable movements, a smaller palm to make it more appealing to women, and an increased compatibility to us an assortment of different camera batteries. all the open source files can be found on the exii github page, where anyone can find the 3D models, code and sensor data. this impressive 3D printed prosthetic hand costs less than $300 USD, and will become a very attractive option for people around in need.


the form of the socket has been improved to prevent malfunction due to interference with the sensor


the flexible wrist allows for more expressive movements


the exii hackberry uses camera batteries to ensure battery capacity as well as safety


hackberry can differentiate between grasping and picking actions depending on the object.


exii’s progress in the bionic arm industry



the exii hackberry is a winner of the 2015 japan GOOD DESIGN gold award, presented during tokyo designers week 2015.


the GOOD DESIGN award was founded in 1957 by the japanese ministry of international trade and industry and is hosted by the japan institute for design promotion. the ‘g mark’ emblem reflects comprehensive design values and principles that aim to enrich lives, industries and society. 




  • Any Partial hand solutions? I was born with about half my left hand.

  • I am a mechanical engineer, i have a 3D printer. I am willing to help some people in my area but i dont have the designs to print. could you please help me out.

    Yousef Hajj
  • I am interested in this device. I hope its cheap. I am a below elbow amputee

    Bryan Ceazar Cetra
  • I am 70 years old and I moved, lately. to Canada. I suffer from severe spine deformations and went trough a spine surgical procedure, not very successful. My daughter in law is a PHD in biotechnology, and developed already some lifesaving medications at Tel Aviv university,
    I tried several times to convince her to develop a biological product to be injected into a damaged spine replacing a herniated disk, but she made me understand that she is not interested.
    I wonder if in 3D printing , one can not obtain a new inter vertebral disk, or the lost part of it, just the way they do in dentistry . About 50% of the population aged over 50 of age, have spine problems some without being able to walk, like myself. It could be a very big breakthrough in spine treatment – all other fixation methods, with metal fixation fixtures, have severe shortcomings, producing inflammations.


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