Introduction: Simple Fidget Spinner

Picture of Simple Fidget Spinner

Since fidget spinners became so popular I've been thinking about making my own version. I came up with a relatively simple design which can be made without any special tools.

Step 1: Things You Need

Picture of Things You Need

For the simple fidget spinner you will need:

Materials

  • 4 (22 mm) ball - bearings
  • 2 component epoxy and something for mixing it
  • the template. (when printing set the scale to 100%)
  • some baking paper
  • acetone

Tools

  • tweezers
  • a pick
  • an acetone resistant container
  • some sort of heat source; I used a halogen lamp
  • files
  • sanding block or disc sander

Step 2: Prepare the "main" Bearing for Degreasing

Picture of Prepare the "main" Bearing for Degreasing

One of our 4 bearings will be used as the "main" bearing in the middle of the fidget spinner. If you use a normal bearing you will quickly realize that it doesn't spin very long. To solve that problem, we have to degrease it.

1. Find out how the protective plate is held on the bearing by giving it a close look.

2. Get that plate out by using your pick and/or tweezers. In my case the plate was held in place by a metal ring which I easily removed by bending it outwards.

3. After removing the metal ring I just had to hit the bearing slightly and the plate fell out. Sometimes there is not even a ring to hold it in place and you can simply pry the plate out.

4. Repeat this step for the other side of the bearing.

Step 3: Degreasing the Main Bearing

Picture of Degreasing the Main Bearing

As mentioned before we have to degrease the "main" bearing in order to increase the speed. This is achieved by rinsing it with acetone until all the grease has dissolved.

1. Fill an acetone resistant container with acetone.

2. Put the opened bearing into that container and shake it until all the grease has dissolved.

3. Take the bearing out of the acetone and check the result. You may have to use some fresh acetone to remove any residue.

Step 4: Prepare for Glueing

Picture of Prepare for Glueing

In order to get a lasting connection, you have to prepare the bearings carefully.

1. Check whether the bearings fit on the template. If not make sure you set the scale to 100%. If your bearings still don't fit double-check the size of your bearings

2. Now you can take a sanding block or a fine disc sander (I used 120 grid sandpaper on it) to roughen up the spot on the bearing where the glue will go

3. Repeat step 2 on the main bearing. Here, you will have to sand 3 spots.

4. Use a paper towel soaked in acetone to remove any grease from the surface. you could put on gloves to protect the surface from the grease on your fingers.

Step 5: Glueing

Picture of Glueing

Now for the most critical step in this instructable. Make sure that you use a level workbench and that you align the bearings carefully with the circles on the template, otherwise your fidget spinner won't run smoothly.

1. Add a good amount of epoxy to your mixing dish. (According to the description delivered with it).

2. Use a small spatula to mix the epoxy thoroughly.

3. Lay your template onto a flat surface and put a sheet of baking paper on top of it. this will prevent the epoxy from sticking to your template.

3. Put the "main" bearing in the middle of the template (as shown in the pictures).

4. Apply a good amount of epoxy to one of the outer bearings and align it with one of the outer rings on the template so that the epoxy makes good contact with the "main" bearing.

5. Repeat this process with all 3 bearings.

Step 6: The Curing Process

Picture of The Curing Process

You could just leave the bearings alone and wait one day for them to cure but I prefer to heat them. This speeds up the curing process dramatically and increases the final strength of the connection. For this purpose, for that, I use an old halogen lamp in a tuner can. You can also use your oven. On the packaging of your epoxy, you usually find a chart with temperature, curing time and final strength.

1. Carefully remove the template from underneath the baking paper. Make sure not to move the bearings!

2. Place your heater over the bearings and let them cure. At 180°C my epoxy takes 5 minutes to cure. When you are using your oven you have to align the bearings on the oven tray because you won't be able to move them from your workbench to the oven without misaligning them.

3. After the fidget spinner finished curing turn it around and make sure that there is no epoxy inside any of the bearings because this will prevent them from spinning.

Step 7: Finishing

Picture of Finishing

You could just stop there but I decided to bring my fidget spinner one step further.

1. You can use a file to remove any excess epoxy but be careful because if you remove too much epoxy the bonds get weaker and your fidget spinner won't last very long.

(2.) You may also decorate your spinner. I would love to see your ideas in the comments!

Step 8: Thank You

Thank you for taking the time to read this instructable, If you have got any questions ask me in the comments I will answer them as soon as possible.

Comments

nemo13 made it! (author)2017-05-21

made mine

nemo13 (author)nemo132017-05-25

yep...

nemo13 (author)nemo132017-05-25

made another one :)
https://www.instructables.com/id/Fidget-Hand-Spinner-From-Old-Hard-Drive

TechnicalKid (author)nemo132017-05-21

hey, looks great! I like it

h9392 (author)2017-05-09

This is a great project ! Current prices are up to $100 for the fancy ones. This is what I did to remove the grease, but not the shields. I degreased a shielded bearing by putting the bearings in a small/sealable container (jelly jar) then added lacquer thinner to cover. Shook the jar a few times during the day. Replaced the thinner in the evening and let it set overnight. Next morning, another shaking. Took the bearings out and let dry. Easy spin bearing for my projects.

NikyN2 (author)h93922017-05-09

there are also cheap spinners for (quite) less than $10 if you know where to look (chinese pages, I mean). I got one of those, and even though I've never degreased it, it still spins for a good while! (so the cheap bearings are not crap).

that said, I still want to make my own. but that's 'cause I'm a DIY person. the chinese thing works really well for the tiny price tag.

afcurlin (author)NikyN22017-05-23

You should upgrade the Chinese one with a new bearing. I upgraded mine with some bones super reds and it spins for 3 and 1/2 min

Valkem (author)NikyN22017-05-09

Yeah, you can get basic plastic ones that work fine for $5 at a number of stores in our area. A few of the family restaurants have been bulk ordering them and putting them next to the registers for $5. Guy admitted to me that he gets them in bulk for about 2.50 each, and at the $5 he sales them as fast as he can get them. Around 200 last month. Like you though, my son is dying to 3D print a body and pop in bearings from his skateboard parts. So we're dusting off the 3D printer to see what we can do there. I might try this idea with him, since it's such a simple, yet nice design.

TechnicalKid (author)Valkem2017-05-09

Thank you. I'm glad to hear, that I could Inspire someone to get out and build something. If you want, I would love to see the finished product in the comments. Good luck!

TechnicalKid (author)NikyN22017-05-09

Jea, that's my point of view as well, you can buy things for a couple of bucks on ebay, but you can also take some time and have fun building it. !

TechnicalKid (author)h93922017-05-09

That's also a way of doing it, I just had to do it quick so I decided to take the cap off and rinse the bearing in acetone :)

Muzammal Baig (author)2017-05-21

Why use bearings for outer weights? I ask because I don't understand.

Because it looks cool

Jakamar42 (author)2017-05-09

Simpler is using a munson or split ring clamp(Lowe's and it is bright copper plated) and a rollre skate bearing. A set screw and two lock nuts make it easer to hold.

TechnicalKid (author)Jakamar422017-05-09

thats true, you can also just take a bearing in your hand, but I realy liked the design of the classic fidget spinners with 3 bearings so i decidet to build mine like this.

RandyJ22 (author)TechnicalKid2017-05-16

Decided

Nyckname (author)2017-05-12

Looks like you finally got your bearings in life.

TimothyK34 (author)2017-05-09

Mate you went to a lot of trouble for no reason why not just buy 3 sealed bearings and 1 unsealed would of saved the dismantling and degreasing stage. Just a suggestion.

TechnicalKid (author)TimothyK342017-05-09

I used what I had at home and washing the bearing just takes 5 - 10 minutes

TimothyK34 (author)TechnicalKid2017-05-09

Yeah that's cool just suggestion for other people who are buying them. Have you seen the self aligning bearings that dont have the metal race inside just balls and the groove is machined in such a way that once they start spinning the balls have an equal space between them. Should look them up it's really interesting how they work. Anyhow good inscrutable, and i like the epoxy curing can. Have a good Day.

TechnicalKid (author)TimothyK342017-05-10

Thanks, i'llhave to check them out

TimothyK34 (author)TechnicalKid2017-05-10

Here is a link to them they are actually grease less ball bearings. http://www.popularmechanics.com/technology/gear/a15603/super-efficient-greaseless-bearings/

TechnicalKid (author)TimothyK342017-05-11

WOW ! that's nice

Tof-Yler (author)2017-05-10

Would you happen to have an average cost for all of the materials? I would like to try it but I don't know if it will financially be worth the trouble.

TechnicalKid (author)Tof-Yler2017-05-10

I can't precisely tell you how much it costs, I used old bearings I had lying around, The epoxy cost about 5 $ but you can use it over and over again!

Tof-Yler (author)TechnicalKid2017-05-11

Alright, thank you!

sleeepy2 (author)2017-05-09

I did not know you could cure epoxy. Great tip, thank you!

cerkit (author)2017-05-09

Thanks for this instructable. I've been wanting to make one of these for a while.

TechnicalKid (author)cerkit2017-05-09

Thank you

BikeHacker (author)2017-05-09

This is so cool. I like the method for curing the epoxy.

TechnicalKid (author)BikeHacker2017-05-09

Thank u everybody complains about the heat that emits off an halogen lamp so I decidett to built a small heat chamber ;)

DavidR224 (author)2017-05-09

The 1st photo has the red grease retainers removed from the middle bearing. The last photo shows the red retainer in the middle bearing.
I do not know how these spinners work. Need to see a video.

TechnicalKid (author)DavidR2242017-05-09

I left the cap on in order to protect the clean bearing from any dust
that may fall into it during the built. Read the notes on the pictures. I
mentioned that

About This Instructable

24,865views

148favorites

License:

Bio: I am 15 jears old and from Austria near Germany, i'm interested in electronics chemistry and physics. I do my best to upload some ... More »
More by TechnicalKid:Simple Fidget SpinnerPCB Etching (prototyping)Solder Holder
Add instructable to: