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This prosthesis has been designed to help those people with missing fingers.

It has been modelled keeping in mind the following principles:

  • Keep the number of printed parts as low as possible. -Keep the assembly process as simple as possible.
  • Use the least possible amount of non-printable parts. In this new model, you can choose how to join fingers, using screws (2M), axes wire, or filament printer. Leave openings in the model to allow the hand to transpire.
  • The previous model had another hand rotation system on the wrist, had more freedom. On this occasion I have modified the movement of the wrist using the fantastic idea of a union that uses hand "Flexy-hand v2"
  • I have also modified the system of tensioning the strings. It is safer than before and takes up less space.
  • I have included a version without thumb for those who have their own finger.

The fingers flex when they are pulled by strings, such as fishing line, and extend automatically with the help of elastic cord. A fabric strap with velcro is needed to secure the prosthesis to the arm.

You can download the original file blender, and thus can be studied and modified to improve its performance.

I hope to be successful with modifications. Thank you very much to " Africa Directo" for suggesting changes and help to improve the model. Isaac texting Prothestic Hand

This design is based on my previous design.

You can download and view files here: http://www.thingiverse.com/thing:1489003

Step 1: Materials

  1. Printed pieces
  2. Pliers
  3. Soldering iron
  4. Emery
  5. Choose the connection system parts between:
    • Filament printer (1.75mm)
    • Screws and nuts M2 10x20mm and 10x10mm. And superglue to fix the nuts.
    • Wire and filament printer
  6. Fishing line
  7. Elastic cord 1mm diameter
  8. Velcro strip
<p>Hi!</p><p>A question: are you able to create an sti for a <br>below the knee prosthetic that can be printed on a Prusa i3 [stereo <br>lithographic printer]?<br><br>The reason I ask is that I have a <br>friend who has been waiting for 4 years for his leg from the government <br>hospital, and would like to help him out; I also have a friend who owns <br>the machine.<br><br>I have spent many hours on the `net, scouring for a leg sti, but to no avail.<br><br>Hence my contact to you.<br><br>Thank you for your time</p>
Is the size based on an adult? Is it possible to scale down for a 9 year old? My son has a left hand deformity and I am interested is paying to get it printed.
I think you can reduce a little, may only 1/3 because if further reduces the space to pass the ropes can be closed
<p>Nice! I would LOVE a 3D printer...there's just SO MUCH you can do with it!</p>
I already made that same one but I had problems with the tensioners wearing out
<p>Hi,</p><p> What kind of problems you have with the tensioners?</p>
The holes wore out. Might've been better out of abs? The elastic string also doesn't make it spring back quite enough. Overall though it did work and looks super cool great design.
<p>cool!</p>
<p>just Great </p>
<p>nice</p>
<p>Your hand looks more realistically curved than other models that I've seen; great job!</p>
<p>I agree; it's one of the best models of its kind.</p>
<p>So well designed! Very cool looking!</p>
<p>This is amazing.</p>

About This Instructable

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Bio: I was born in Madrid, Spain. I started drawing and modeling in my early childhood. I studied Fine Arts for five years at the University ... More »
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