Cardboard Chainsaw





Introduction: Cardboard Chainsaw

Make It Move Challenge

Second Prize in the
Make It Move Challenge

Halloween Decorations Challenge

Finalist in the
Halloween Decorations Challenge

Hi, this toy chainsaw can be used on several occasions since trash movie to a fantasy party. It operates very simple: a button is pushed on the handle where it is held, which connects the engine and causes current to run. It was made with recycled materials that I had at home.
I hope you enjoy.

Step 1: Materials Needed

- 04 gears of a bicycle rear derailleur gears (screw, inner cylinder and the two caps, each);

- More than 02 screws to the inner cylinder;

- About 75cm bike chain (run);

- Slatted wooden box *

* I used 3mm balsa wood as he had at home. Can also be used thick cardboard (0.5 mm) which is much easier to find.

- Cart with a gear wheel, as figure;


- Standard servo modified for continuous rotation (see the internet how to make this change);

- 2 hangers (servo arm as shown);

- 2 small screws or glue to attach the hangers.

- 1 support for four batteries

- 1 normally open switch

- Hot glue, glue, ruler, pen, pencil, etc ...

Step 2: Preparing the Servo

After turning the servo to continuous rotation, solder two wires directly contacts the engine, by-passing the electronic circuit. I used the wire itself the servo, taking care to leave a tip of three wires which were originally linked to later be able to use again as a servo. That done, simply reassemble the servo. A good tutorial on how to put the servo continuous rotation:

Combine the two crosses as figure using screws or gluing tight.

The crosses were selected because they have a center that fits mayor, allowing an optimal alignment between the servant and gear.

Step 3: Mounting Saw

The saw was made with a piece of old bike chain (about 75 cm) but would be very heavy. At first I put the chain on top of the strip and tried to find the best position for the gears. After that, I made the holes with a drill, mounted and fixed gears. I put the chain and marked with a pen so that when she was stretched, it should come as much as possible around the body of the strip. After these adjustments, I made a template to facilitate.

I made a servant to put the amount and stuck it into the body of the mountain by the same method of trial and error. It was found that the chain was still a little loose. Hence, I used two screws to the metal cylinder to stretch the chain a little. the result was very good.

Note: This metal cylinder must be supported only by the screw, that is, it must run to pass the stream.

Step 4: Body of the Saw

The body of the saw was made of cardboard.


- Cardboard

* Note: I used a 0.5 cm thick. This determined the distance between the edge of the body and the workpiece support.

- Hot glue;

Print layout and paste the picture on the cardboard . Cut and assemble.

Now, just paint and is ready



    • Science of Cooking

      Science of Cooking
    • Trash to Treasure

      Trash to Treasure
    • Paper Contest 2018

      Paper Contest 2018

    We have a be nice policy.
    Please be positive and constructive.




    Umm, is there a video? I'm sorry that I find this hard to understand but it would help. I'm just a 13 year old trying to mess around and just try to get it to work. Will a video be up soon? Or could you link me to the video? Thanks!

    Hi. Its a old project with no video but i will tri to make one.

    Putz velho, bom demais, criatividade é tudo!
    Bom achar um BR aqui no site =D

    Do you have a video of this going?

    Oh yes. But I'm having difficulties to embending.

    just upload to Youtube and post the link - this chain saw is so incredibly cool buuuuut in this day-and-age you gotta have the video demo. can't wait to see this baby in action!

    hehehe.. soon i will make other video

    If you would like, I can embed it for you if you give me the link

    It has a lik of running gear. You can place?