Squeezable Stress Spinner





Introduction: Squeezable Stress Spinner

About: Instructor by trade at MMI. Hobbies include all air RC, 3d printing, and I love 3d modeling

I designed this for the fidget contest here on Instructables. I didn't want to make just another standard spinner so I attempted to design a spinner that could be used like a stress ball and spinner all in one. There are not a lot of extra parts to buy as the majority of the fidget can be printed. I will list the extra part and where I bought them when we are discussing those parts later on. I know that every printer will print a little different so you may have to sand down some parts.

Step 1: The Parts to Be Printed

I printed these in PLA, with the settings of:

.25 layer height

2 top, 2 bottom, 2 shell layers

50% infill

no supports, no rafts

I designed the (gray parts) top housing as 1 part with enough clearance for the arms to rotate, and the bottom housing the same way with 4 hooks to snap together with the top housing. If you attempt this do not get discouraged if the parts don't fit exact, as I mentioned not all printers print exactly the same way. Play with the settings and you will be able to print it in one piece as it was designed to be.

Then came the (yellow parts) spinner end caps that are made to slide into one another to keep the spring located as it should be, while allowing you to completely compress the spring without having the spinner buckle in the middle.

Step 2: Assembly

You will need to purchase the following parts for assembly:

1/2" Steel-Ball slingshot ammo (12 oz), doesn't have to be these exact ones but the same size.


Generic Abec 9 Precision 608 Zz Bearing,doesn't have to be these exact ones but the same dimensions

I will tell you that you will need to remove the seals (red) and then clean the grease out of them so they can spin freely. I just used a razor blade to lift the seal out then ran them under hot water to melt the grease away, and of course dry them out. I also applied a tiny amount of super lube in them and spun them just to help get the water out.


A 3 inch spring from Ace hardware, it does not need to be exact, you will want to go to your local supplier and actaully squeeze different springs to see which one feels good. I choose one that was fairly easy to squeeze but at the same time was strong enough to extend the spinner when it was spinning.

Next step is to install the bearings, gentle push the bearing into the top and bottom housings as seen in the pictures. You may need alittle force as they were a tight fit when I did it. Then comes the 4 ball bearings. I used a pair of pliers to help install them, if you installed them correctly they will actually pop into place as the holder was made so they would snap into place. If you have the ball out one side more than the other then it is not fully seated. All I can preach here is patience is you friend.

Step 3: Continue Assembley

Take the yellow pieces that support the middle and assemble them to verify fitment as seen in the first two pictures. They should be installed end cap, spacer, then spring guide. The top and bottom are different but they will only fit on one cap each as they have different size holes.

You may have to clean them up some to get a nice fitment. Once they fit nice lets install them on the actual housing to verify they fit those also. Once on test spin them to see if you have any binding. If they are very sluggish or harder to turn make sure the spacer is installed after the bearing before the spring guide. I have included a short video of the assembly. While I was assembling it the first time I also applied a little super lube to any plastic pieces that had to move such as the two middle shafts.

Step 4: Final Steps

Test spin it and enjoy! This spinner will not spin as long as some store bought metal spinners, but it still is fun to play with. I have also included the .stl files (on the next screen for you) if you would like to make one.

Step 5: .stl Downloads

Hope you enjoy.

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Invention Challenge 2017



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    12 Discussions

    I am no big fan of fidget spinners etc, however, I can recognise the thought and ingenuity that has gone into its design and that is why I am voting for this in the 'Inventions' Contest.


    2 replies

    Luke, thank you for your comment and your support

    Nice idea! This made me think of a kind of spinner that when you compress it, it spins up the spinner. Like one of these toy spinners out of tin for babies. And also to design the springs so that when it's compressed, it's easier to hold together. No clue if or how that would be possible :)

    4 replies

    Funny you mentioned that. That was my first idea to make the squeeze activate the spin just like the old toys. Thank you for the thoughts, as for the spring it would be simple to just unclick one side and swap the spring out. That way you could try multiple spring to you find the one you like.

    BTW you could have parallel arms like a delta printer to keep the two sides stable in regards to each other, then you wouldn't need a center part of the spinner at all.

    All good points, gives me some ideas for the next one.

    Well or connect the springs on a kind of lever. Like between the two parts that move outwards so the leverage is effortless when pressed together. Like a rubber band between the middle hinges. I don't even have a spinner and might be overthinking it or it might not be needed at all, just some thoughts :)


    1 year ago

    Thank you for your comments, I appreciate the feedback. I actually designed this for the fidget contest but it fits in the invention contest also. If you make one please share your pics and thoughts, they will definitely help me with improvements for future projects.


    1 year ago

    Honestly, you are such a creative mind, and brilliant for this idea. you definitely have my vote, because this deserves to win.

    You got my vote! This is an awesome invention! Much better the other crappy, overrated, and lame things that you can buy...

    Very cool!!!

    That's awesome. You've got multiple kinds of fidget toys in one. I like it.