The Octavius Grabber Claw Parametric Length

by jasonwelsh, published

The Octavius Grabber Claw Parametric Length by jasonwelsh Jun 23, 2013
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13747Views 2557Downloads Found in Hand Tools


This could be a toy or a tool.
Myself, well I have been snatching things from my kids like toys, and trying to pick up weird objects ever since I made it.

That is me however, I would say that a person that could not bend to pick up things would love this design.

So whether you use it to pick up the remote from the floor / snatch fruit from a tree / grab a frog from the pond / chase your kids with it, etc etc etc good or evil I'll leave that up to you ;)

Watch the video to see it in action


You will need the following required things.

4- 3mm x 25mm screws
1- spool of 30 lb fishing line
1- piece of cpvc any lenght
1- elastic string (around the size of 1.75 Filament) Found in most craft stores

PlA 3mm and 1.75mm for making PLA spikes

Plasti Dip- an amazing product that you can dip your printed items in to give them a rubber coating.

I used that on the finger tips.

Other Building tips can be found here


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It would be really cool to see that concept as a grapple hook. maybe have spring loaded plate in the palm of it that causes it to clamp shut.

i am making a boat that can pick stuff up from the bottom of a pond. would this design be capable of doing that task???

Thank you! I think I will make this for a couple of my nephews:)

Superb! Thanks for sharing with all of us. :)

weird these msgs never entered the dashboard feed.

I used cpvc 1/2 not to be confused with pvc --- look for the light tan pipe used for both hot and cold water in your house. It has a 1/2 ID and a 5/8 OD. And is very cheap.

The Elastic is http://www.joann.com/dritz-round-cord-elastic/prd2904/http://www.joann.com/dritz-rou...

love that stuff ;)

Print at 100% for it to fit the 1/2 cpvc

Hope that helps , sorry did not see these msgs earlier

Also, what kind of elastic string did you use? I used Elastic Cord (http://www.beadalon.com/elastic.asp)http://www.beadalon.com/elasti... which doesn't seem to be... well, elastic enough :p

Hum, I printed at the default scale, and found out I had to track down a some 5/8th inch acrylic tube to fit the pieces.

What diameter PCV did you use, and did you print it at 200%? Or maybe just happen to have some small PCV lying around?

I think sugru would be good around the tips. You can shape it however you want and give it some ridges. Great claw, thank you for sharing it :)

Festo's robotic creation "Bionic Handling Assistant" Just like Doctor Octopus' Robot Arms. http://www.festo.com/cms/en_corp/9655.htmhttp://www.festo.com/cms/en_co.... Go to the "Film" tab in the middle of the page!

Tennis balls are no problem. What are you using to pull the strings? If your not attaching it to pvc it will scale up just fine. ;)

At 200% you could use 3mm filament on all the joints.

Thanks :-)
I was planning to use hobby servos to pull the strings

Love this :-)
Is it large enough to pick up a tennis ball ?
If it is I want to put one on my quad-copter for picking up and dropping tennis balls

The thumb's angle draws the object up if its a larger object. I think that would put a twirl on the object if it was smaller.

good design, but have you thought of having the fingers cross? so they pick things up to the palm and hold, rather than just with the fingers?