Picture of Hydraulic robot made of cardboard and scotch duct tape.
[ please give me a vote for the contest if you like the instructable, thanks]

I always wanted to do this project but in all the guides i always found that you need some kind of wood cutting skills and/or tools. So … I decided to make a simple hydraulic robot with cardboard, reinforce and hold by duct tape that anyone can do.
Duct tape not only is strong but also looks pretty cool; it gives the robot a cool metal like look and it holds everything together really good.

Step 1: What you are going to need!

Picture of What you are going to need!
- Cardboard box (the harder the better, I used a pizza box but you can used any type because we are going to reinforced with the duct tape)
- Scotch Duct tape (I like the silver because the metal like look)
- 3 machine screws 3 inches in size with nuts
- 2 machine screws 1 ¼ inches in size with nuts
- A flat and square piece is wood ideally 12 inches by 12 inches for the base to attach the robot
- 8 syringes (you can get them at any pharmacy without prescription just say you need the type that is use for cough medicine, you can’t put a needle on those. I got mines at CVS and Walgreens for free)
- 6 feet of clear tubing ¼ “x .170” (got mine at home depot for $3)
- Water
- Scissor
- Ruler
- Pen
- Drill
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RohanJ2 made it!15 days ago
It's amazing
MudassirM2 months ago

this is the best one among all i have explored on this site

you are simply awesome like it

DanX13 months ago

Looks great!

holyrice3 months ago
Does anyone know whether 1 tbsp syringes work or if 2 tbsp. (10ml) are needed?
aeliz113 months ago

thank you so much. this is gonna be perfect for my finals :)

LoganW15 months ago

ducktape makes it heavier just like nuts and bolts

LoganW15 months ago

i am making it for a school project

JordanP36 months ago
Hey my friends and I r going to make this but can someone tell me if it's possible to remove the claw and put an electro magnet which will be connected to a battery....... Thnx in advance
JordanP3 JordanP36 months ago
Thanks not for telling guys
adirsingh966 months ago
Thank you for sharing this!!!
ManisshaR7 months ago

THIS is awesome, but can u tell me what is the amount of the syringe used to fill water (ml or cm3)

#Making it for techfest

I made the project for science exhibition and everyone were amazed to see it thank you!!!
Bsinatra999 months ago
ShamanthS10 months ago

nice project,but complicated.

sreekanthv31010 months ago

my best friend and i are going to make this ! please wish us the best of luck guys.....

TonyG410 months ago

jturjjjenhwkkjjn eukj ruioi wiuoi;wujo;

Bombard99911 months ago

this is really cool i made on of these last year. it was fun till it started leaking after several hours of hard use. i should have used hot glue on it to protect from too much pressure and syringes exploding. i also tried adding a tiny pump for automation and broke some tubing. anyway a fun simple project with room for making better and better.

After already having purchased hardware for this project, I see we used the same diameter & thread pitch (#10-32) screws (I didn't see the package with the size on it in the photo before), but you might consider putting the diameter & thread pitch in addition to the length in the instructions to eliminate guesswork.

adavis821 year ago
Has this problem been solved before if yes how can you apply the information to your solution? Include material and machanisms or devices in your answer if no then include the materials and mechanisms or devices that would use to solve the problem

what is your research question

what is your hypothesis

what is your independent variable

what is your dependent varible please respon

swapnil19973 years ago
how to fill the water in tube can u just tell me.....we are trying but the air gets in so how to do it just tell us .....PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! so that our project get selected for science fair....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!

take the push tab out of both syringes, then connect them by a tube, fill the tube with water and place one of the tabs into its respective syringe. Then fill the other syringe with water over a sink, allowing the water to overflow and when it begins to overflow insert the other push tab while the water is flowing.

for 10ml syringes:
1. Fill up one syringe all of the way
2. attach the tubing and push water through it to remove air
3. with the end of the tubing submerged, fill back up to 10ml
4. attach the other syringe. You now have a simple hydraulic system

For smaller than 10ml you may need to remove air from the tubing by utilizing the siphon principle

Hope this helps!

nice one..................its awesome but i am having problem with the syringes

there air is remaining in the syringes so its not working properly

plse reply ............................................what to do!!!!!

nice one..................its awesome but i am having problem with the syringes

there air is remaining in the syringes so its not working properly

plse reply ............................................what to do!!!!!

also, the water keeps leaking out of the syringes. how did you attach the tubes and syringes together?

u might be using syringes with the wrong type of nozzle

Nelson_Yepez (author)  johnnyalbrite4 years ago
Thanks, the way you set up the tubes it up to you. The only really advise i can give you is make sure that the tube is long enough, the best way is to measure with all the parts of the arm fully stretched out.
As far as holding the syringes, the diameter of my tube happened to fit perfect the tip of my syringe, not to tight not to loose. If this is not your case you can just use some hot glue gun.

good luck with your science fair.
rahuln30004 years ago
its really cool but i think it would be really helpful if u put the template original size co that we can print it out especially for the claw it is really confusing.
but its a reallly cool and time passing activity thanks.
rehman0078699 made it! rahuln30001 year ago

Relax don't worry if u have an ipod touch or any touch device, set its brightness to full, open the picture of the claw template and trace on a piece of paper the claw. so yeah, Apple ROCKSSSSSSSSSSSSS! (I did it in the same way, for last years science fair and it was gr8)

nice instrutable...... i enjoyed doin it.....
nroy72 years ago
pchua12 years ago
COOL!! Can you please give me your e-mail so I can keep in touch with you? I will try to do this tomorrow! PLEASE!
pchua12 years ago
COOL!! Can you please give me your e-mail so I can keep in touch with you? I try to this tomorrow! PLEASE!
vtadepalli2 years ago
wow this is reallly coooool!!!!!!!!!!!!!!
DrippySpaff2 years ago
Really Terrible. My dog went into my lap and took a poo and his peepee fell off than he died
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