Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Prosthetic/Robotic Hand Printable As An Assembled Unit Without Supports

by profhankd, published

Prosthetic/Robotic Hand Printable As An Assembled Unit Without Supports by profhankd Oct 1, 2013
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You might have heard about the 3D-printed prosthetic hands created by Richard Van As and Ivan Owen for about 100 children thus far. That's a great thing they've been doing. There's also a "Snap-Together Robohand" version, thing 92937, which is intended to be easier to build. I'm sure it is... but it still takes half a day to print the parts and assemble them. Unfortunately, I had less than 3 hours total on Saturday, September 28, 2013, to give an overview of making technologies and have YMCA Black Achievers students actually build something.

So, I designed a new prosthetic/robotic hand for which all the printed parts print assembled without supports in less than an hour. You still have to thread some fishing line and rubber bands through it, but from print start to working hand is easily done in less than 90 minutes using a total of about $1 worth of materials!


Printed in PLA at 195C, 0.25mm, 25% fill. Sliced using cura.

An Instructables gives the details:

For now, I just have the STL file posted. However, this was built with the same not-yet-released hinge library I tested by making Thing 120179, and I plan to post the openscad source for this too.

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Hi There,
My second grade classroom and I just got a makerbot mini and I was wondering if this design is compatible with it? Thank you!

Should be compatible, but only one hand at a time for that small build plate.

Can you upload this as two separate hand files? I would like to print this but the file is to large for my printer to print both at the same time.

Could you upload your design? It looks very good, but I don't see it in thingiverse. Thank you.

Yes, that is quite similar... needing 2 plastics vs. needing rubber bands threaded.
I actually just got some of the rubber-like PLA.
Our M2 only has 1 head, but I can easily imagine printing that, stop, then the hard layer (with hinge)....

Thanks for the positive comments. I've got a lot going on right now, but I hope to get the full hinge library and a customizer version of this design posted soon....

Awesome :) Thanks for sharing this!

What a great redesign, thanks Hank!

Love the simplicity of your design! Is there any chance you could make a video of the hand in use/motion?