The Limbitless Arm

Thank you for visiting our website! e-NABLE volunteers are working hard to create free 3D printed hands for children all over the world who have been born missing fingers or who have lost them due to accident, illness or war. To date – we have created nearly 1000 free “Body powered” 3D printed devices for over 700 individuals and the numbers grow daily!

All of our current designs are shared open source so that anyone that would like to make one for themselves, their child or someone they know – can take the files and create a device or improve upon the design and re-share it back to the community! (Please feel free to join our growing Google+ community and share your ideas with us!)

If you have a 3D printer and would like to help create hands and arms for people in need or if you are in need of  device yourself, please visit our “Get Involved” page and fill out our intake form!

If you do not have a 3D printer but would still like to help us “give a helping hand” – please consider making a small donation to help us on our quest to supply free hands to all who ask.

We are actively working on new designs for children (and adults) with all different types of upper limb differences but most of our designs require a functional wrist or elbow to power the mechanical devices. We have some experimental designs that are being tested and created by various groups within the community.

One of these designs is the “Limbitless” myo-electric arm that you may have seen in the “Iron Man” video recently!

This experimental design was created for individuals with above elbow limb differences by a team of students at University of Central Florida. Only a few have been created so far and they do have a wait list. This is currently the only team that is able to create these devices as they require more time, electrical expertise and a more robust printer than the average e-NABLE volunteer has to print with.

Developed by the UCF Armory (University of Central Florida), led by Albert Manero, the Limbitless Arm is e-NABLE’s first myoelectric design. The Limbitless Arm is licensed under the Creative Commons-Attribution-Non-Commercial license.

All files for this design can be found on Thingiverse, HERE. For detailed instructions on which files to download and print, see below.

For more information on this design, please contact the Limbitless team directly: [email protected]


The instruction manual can be downloaded HERE. It has been estimated that it costs approximately $350 for all of the required materials to produce a Limbitless Arm.

Parts List: Limbitless_2-032_preview_featured

To Print:
Forearm Lid
Flexy-Hand (at 80% for current version of arm)

Muscle Sensor: (
Arduino Micro: (
Aircraft Servo (150 oz-in) (
LiPo Batteries (Currently configured for two 3.6 V and one 7.4 V, though we are reducing it to a single battery)
Battery Chargers

Shoulder Harness:
Shock Doctor Shoulder Brace (Optional): (
Velcro Straps: Lowes

Small Rubber-bands or elastic wrap (we are moving to a hinge and track design for the next version however)
Foam Inserts
Velcro with adhesive back
Flexible Shaft Bitholding Screwdriver: this makes life much easier
Helicoil or anchors for mounting the hand/elbow.
Kevlar Survival Cord (.036″)
Fishing line to thread the cords
Micro-grip finger tips




By accepting any design, plan, component or assembly related to the so called “e-NABLE Hand”, I understand and agree that any such information or material furnished by any individual associated with the design team is furnished as is without representation or warranties of any kind, express or implied, and is intended to be a gift  for the sole purpose of evaluating various design iterations, ideas and modifications. I understand that such improvements are intended to benefit individuals having specific disabilities and are not intended, and shall not be used, for commercial use. I further understand and agree that any individual associated with e-NABLE organization shall not be liable for any injuries or damages resulting from the use of any of the materials related to the e-NABLE hand.