Introduction: Knex Differential

Picture of Knex Differential

Hey guys, this is some little side project of my new knex ball machine, a differential!
So i thought, why not make a instruction for it?
Hope you guys'll like it!

Check out for more awesome projects!

Step 1: The Side Gears

Picture of The Side Gears

Step 2: The Other Gear

Picture of The Other Gear

Step 3: Finishing the Box

Picture of Finishing the Box

Step 4: Done!

Picture of Done!

Yeah, this ible is a bit short, but it's been so long since my last ible, hope you still liked it!

Be sure to check out for more awesome stuff!


The Knex Inventor (author)2016-07-24

Nice. I love how compact it is! Favorited. :-)

www139 (author)2015-11-21

Nice little differential! I made it in 5 minutes. :P

Sorunome (author)www1392015-11-21

Haha, thanks!

www139 (author)Sorunome2015-11-23

Sure! It was fun to make too :P

noahspurrier (author)2015-08-19

This is one of the best looking k-nex differentials.

Sorunome (author)noahspurrier2015-08-20

Thank you!

Rudy3983 (author)2015-06-21

what does it even do?!?!

ahmetasc1 (author)2015-03-01

it can not turn in the same direction on both sides?!?!

Sorunome (author)ahmetasc12015-03-04

No, that is not what a differential is made for.

ahmetasc1 (author)Sorunome2015-03-21

actualy this can run. I try another differential model (in this site) same like yours, but it is smaller than yours, it runs.

didexo (author)2014-07-03

What does this actually do?

airmanT-28 (author)2014-06-30

This is fantastic. I will use it in my knex emergency vehicle. Do you know of any smaller differentials?

Sorunome (author)airmanT-282014-06-30

Sorry, no :(

But glad you like it!

airmanT-28 (author)Sorunome2014-06-30

I do like it, and I just finished installing it into my semi truck but it isn't a perfect fit and I will have to perform some rather large modifications. Oh, well. If it comes to it, I can just invent my own. Oh, and thanks for your Rubik's cube tutorials. They really helped me out with the perplexing thing.

Sorunome (author)airmanT-282014-07-01

Haha, glad I could help out :)

sandroknexmaster (author)2013-06-17

Yeah you're back!!!!!!!!
Feels good to touch some knex after a year without, isn't it? :P
I'm already looking forward to your next ball machine, can't wait!

Me 2!

Sorunome (author)dickheijboer2013-06-17

Ha, thanks guys!
It's just a bit hard to build without knex and I was in the US as an exchange student for a year - of cource without knex.
And it was first of all wierd to touch knex and I was thinking: did I seriousley manage to make big ball machines? HOW???????? lol

jmiester (author)Sorunome2013-06-17

My main constraints are time and space...

Seriously, I'm not making a joke there XD

Sorunome (author)jmiester2013-06-17

My problem is that i get too focused on ball machines and i hang down with the other things like school

jmiester (author)Sorunome2013-06-17

Hey, keep it up, and you could become the Sean Kenney of K'nex. =D

Sorunome (author)jmiester2013-06-18

What's that? ^^

jmiester (author)Sorunome2013-06-18

Look him up. XD
He does amazing art with LEGO

Sorunome (author)jmiester2013-06-18

wow, that is EPIC lego work O.O

jmiester (author)Sorunome2013-06-18

ikr? but the crucial thing is: you could be his equal for k'nex >=D

Leigo Andre (author)jmiester2013-08-03

Ill differ on that. You forgot about ME!

Sorunome (author)Leigo Andre2013-08-04

nope :P
/me hides

Leigo Andre (author)Sorunome2013-08-06

You can't hide from ME!

Sorunome (author)Leigo Andre2013-08-07

yes, i can :P

Leigo Andre (author)Sorunome2013-08-07

/uncover, /hack, /privatenetworkkey18364

Sorunome (author)Leigo Andre2013-08-07

you can't fool me with computerstuff, sorry :P

Leigo Andre (author)Sorunome2013-08-07

End Of Conversion my end


Sorunome (author)Leigo Andre2013-08-08

erm, nope :P

jmiester (author)Leigo Andre2013-08-04

Forget? I didn't even know you. Sorry. XD

Leigo Andre (author)jmiester2013-08-05


Sorunome (author)jmiester2013-06-19

that would be hard O.O

jmiester (author)Sorunome2013-06-19

"Nothing worth having was ever achieved without effort" -Theodore Roosevelt

Sorunome (author)jmiester2013-06-20

True story >.>

dickheijboer (author)Sorunome2013-06-17

Haha, If I don't touch K'nex one week, I would be depressive.. XD

Same here. I left California and went to Colorado for a year for school while my knex sat here collected dust. But I'm not leaving for a year again!

Luckily :D

Sorunome (author)Leigo Andre2013-08-04

Ha, same here :P i will NEVER leave my knex again

Leigo Andre (author)2013-08-02
This is Similar to the one in my KNEX SHREDDER!!
Model #001 KMDN Sale: Available Soon at
Sorunome (author)Leigo Andre2013-08-03

ha, that one is pretty funny :D

Shadowman39 (author)2013-06-18

I see you decided to post it, nice! But, one thing it's missing is the outer gear. I'm looking forward to seeing how you built the lift mechanism with this design. ;-)

Sorunome (author)Shadowman392013-06-19

Ha, the funny thing is that I don't need this thing anymore.
And the outer gear would be easy to add with a big grean gear (I have two of 'em)

Shadowman39 (author)Sorunome2013-06-19

Yeah, I have some of those gears as well.

Sorunome (author)Shadowman392013-06-19

I know >:D

Let me get this right...the differential simply reverses the direction of the rotation from one side to the other? Pretty nifty, lots of uses for that...

Ha, thanks, actually it is used in cars if you turn the box because if you drive in a curve and you turn the box the inner wheel can be slower than the outer wheel.

About This Instructable




Bio: You can find me over on Knexflux!
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