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🏗️💧 I Built a Hydraulic Excavator Arm at Home (Using Injections & Pipes!)



Hey, it’s me, Sintu — a teenager who loves building stuff instead of just watching reels all day 😅. Recently, I built something super cool: a working Excavator arm that uses hydraulic power. No motors. No batteries. Just water, pressure, and some jugaadu creativity. Here’s how I made it 👇

🧰 What I Used to Make My JCB Arm

I didn’t buy any fancy kit. I made it with easily available stuff (and some from the local medical store 😆)

🧩 Item💡 Use
6 Injections (Syringes)   For creating the hydraulic push-pull action
PVC Pipes          For making the frame and structure
Plastic Pipe / IV Tube        For connecting the syringes and transferring pressure
Wires       For joints and extra strength
Water      The actual fluid to create hydraulic pressure

🛒 Similar stuff on Amazon (you should buy them for every robot):


  • 🛠️ How I Built It

  1. Built the Base: Used PVC pipes to make a steady base like the body of a JCB.

  2. Made the Arm in 3 Parts: Just like a real JCB — base arm, middle joint, and bucket.

  3. Attached Syringes in Pairs: One on the control side, one on the arm side.

  4. Connected Syringes with Pipe: Filled the pipe with water (no air bubbles!) and sealed tightly.

  5. Tested the Push-Pull: When I pushed one syringe, the other moved — that’s hydraulic power, baby!

🎉 What Happened Next?

When I pushed the syringes slowly, the Excavator arm moved just like the real one! The joints worked, the bucket tilted, and it actually picked up small stuff like paper balls and erasers 🤯

🧠 What I Learned

  • How hydraulics work (basically science in action)

  • Importance of airtight connections

  • That you can build BIG things using small parts 💪

📸 Should I Share My Build Video?

I recorded some clips while building this. Thinking to post it on YouTube or Reels. Should I? 😁 Drop a comment or DM if you're curious!


that looks like this

💬 Final Words from Teen Engineer Sintu

If you’re a student or teen like me, don’t wait for school projects to start building. Just grab some syringes, pipes, and your brain — and boom, you can build your own machine! 🚀

And yeah... if you wanna support my future builds, you can grab stuff using my Amazon links above. Helps this robo-boy keep creating 👊

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