Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Printable Brain Gear

by FuzzyDuck, published

Printable Brain Gear by FuzzyDuck Dec 8, 2011
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21869Views 4834Downloads Found in Mechanical Toys


All the big 3D Printer suppliers always show off braingears printed as single items. This is to show that even our humble hobby printers are capable of printing a brain gear - all be it in seperate parts for assembly later.


You might need to scale the parts up by 200%. You could even try and scale this thing up as high as your printer will allow you to.

You'll need to orient the parts so the flat sections sit on the base/build plate of the printer - that's how they were designed.

Print all the parts needed, then assemble. Glue all the links together at ounce before sliding them in - don't try to glue each link individually.

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I note that the gear .stl file has them tilted at a 45 deg angle with respect to the horizontal. That won't print well on my MakerFarm i3v without some sort of support. Am I missing something?

I love it! Especially with the BFB logo! You don't see many of them around here.

I've started to print this on my 3DTouch in solid green PLA :)

I may need some help with the assembly once its all done. Do you mean glue all 3 groups of 4 links together and then slide them into the gears?

Great. Let us know how it goes, pics are compulsory.

You will need to assemble the entire model complete. Youll notice it works fine but will fall apart. Use a slow setting epoxy and put a dab on each end of each link, then slide them all together and hold in place till the epoxy dries. Be carefull not to get glue on the gears themselves

Base is complete! Onto the Link...

What feature in CAD did you use to put the text on the object?

But that's cheating!

I can print anything on my ProJet machines, but there's no fun in that. Printing stuff like this on the 3DTouch or RapMan gives great satisfaction

Besides, I always say - Printing fully working assemblies in a single print is great - it shows off what the machine can do - but if it's a prototype part of something which will be produced using conventional methods for production - what's the point - if you can't assemble it you're defeating the objet