Math Spinner Enhanced (fast print, no support)

by pauloblank, published

Math Spinner Enhanced (fast print, no support) by pauloblank Sep 5, 2014

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57939Views 12147Downloads Found in Math


This is my remix for this great educational toy. I remodeled it to have negative and draft characters, so no need for supports. Also no need for part cleaning, and the central tube is a standard 1" PVC tube.

UPDATE: I've included my version #2 for 32mm water PVC tube. This is the white and pink smaller assembly showed in the pics. Also prints faster (~3,5h).

UPDATE: Take care, version 1 is for 25mm tube, not 25.4mm. The modeled internal diameter of the wheels are 25.6mm . So if you use the 1" tube, please scale the part in X and Y to increase the gap, otherwise it won't turn.
Version 2 is for 32mm tube, wheel's hole is 32.6mm

UPDATE: Someone asked for a '=' wheel with '> <' signs so I did it for the 32mm version. STL available now.


I've printed in ABS 0,2mm layer, 10% infill, no suport, 50mm/s. Took ~4h to print.
Print 4 numbers, 1 operator, 1 egual, 2 end caps.
Cut a 1" water pipe with 139mm, assemble and superglue the caps.
All done!
Enjoy !
Paulo Blank
Mech Engineer
UPDATE: For version #2 cut a 32mm water tube with 112mm length
UPDATE: Added the Solidworks 2015 files for the 32mm version (small)

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Wish schools would've had something like this when I was a kid, I'm useless at maths!

a Comment just to say thank you... it print out perfect with recommendation.
i will upload picture in "I Made One".

regards from Chile!

Would you mind confirming what font was used for the numbers. Interested in posting a remix for fractions (my daughter needs some help), and would like to mirror as close as possible the numbers you have used. Thanks,

If you are in the US and want to use 1/2" "standard" PVC pipe (~21.5 mm outer diameter), scale the V1 files to ~84% for a nice fit.This will vary slightly depending on your material and printer.

Comments deleted.

Very nice model.
My name is Juan Carlos from Argentina.
I print one to my 9 years niece and she likes it very much
After the gift other relatives ask to print them anothers.
I want to ask you if you have any issue if i charge them 3 or 4 dolars only by the material that i use.

I am trying to download the tube but when I download the file there is no tube in the file just the gear shapes. Would you mind reposting the tube file?

its pvc i think

Oi!!! Qual impressora vc usou? Obrigada!! Ficou ótimo

I LOVE THIS! Very educational! Perfect!
There are too many files, so I'm not sure which one I printed out.

In the US, I went to Home Depot and bought a 1/2" by 2ft PVC pipe for $1.40, which could make 3 pipes for this. Ask them to cut it; they have an awesome hand cutter.
The 3/4" was too big. It's ok to have space, since it won't rotate much. If you want, you could put that foam (box foam) on the pipe.

Thank you!

This is really cool great job! would you have a blank spinner without any symbols or numbers?

This looks great! I'm printing mine now, but I was wondering if you could add two files: I'd love to have the center tube as a separate file. Also, could you add greater than / less than signs to the equals ring? it seems kind of useless to have it rotate without any other markings on it... Thanks for such an awesome project!

Sure, give me some time to upload this. Cheers, Paulo

Hello! Was wondering if these two files were ever added? Best wishes.

sir in what application you did this thing please pm me

solidworks. It's the best!

I printed a number wheel to test, and it is too small to put on a 1" PVC, much less spin freely.

I guess it's because my design is for brazillian standard, 25mm water tube. I guess the US standard is 25,4mm external diameter. I can generate a version 1.2 to inch standards, let's say with 26mm hole to fit in your 25,4mm tube. OK for you?

Ah, thanks, that was the problem. It was off by just about a millimeter. No worries about a US standard version for me, I wrapped a smaller pipe to get the size I wanted and it works well. If you want to create one anyway for the community though I'm sure others would appreciate it.

Cool design, btw, my daughter likes it. Thanks!

V1: The internal hole is 25.6mm. If you want more clearance, just scale the parts in X and Y axis by the factor, like 26/25.6 = 1.015
V2: I personally prefer the version 2, smaller, faster, nicer. The designed internal hole is 32.6mm. Just adjust the XY scale to your available PVC tube and go for it !

Awesome! I never found the time to revamp the design but I'm glad you (and others) have!