Introduction: K'nex Gearbox: Make Your Motor 6x Faster/slower!

Make your battery or mains or even wind up motor more than 6 times faster than it's normal speed!


zmxninja (author)2012-02-15

Also check out mine, i dont mean to take peoples attention away from this great gearbox but i was wondering if anyone could encase mine for me

Lowney (author)zmxninja2012-02-15

sure I'll check it out

zmxninja (author)Lowney2012-02-16

thanks, thinking of making an ible for you, might even show people how to put this into a car :)

Lowney (author)zmxninja2012-02-16

Thanks, but don't worry about it: I think this slide-show is enough and it's not the most practical gear box either. Maybe you should make an improved, more compact one :)

zmxninja (author)Lowney2012-02-17

Ok. Check out my gearbox. I made a pickup truck with my gearbox . should i post

Lowney (author)zmxninja2012-02-17

Why did you post the same comment 3 times with slightly different wording lol? Anyway it looks kinda nice, but the body could do with a little beefing up, and the resolution of the images is quite low there. There are some great car instructables on this site to give you inspiration! I have a couple of tank designs on my instructables page too but I don't know how possible it is to modify those designs to allow for this gear box. These pictures look like a good first prototype though!

zmxninja (author)Lowney2012-02-18

i dont now how that happened lol

zmxninja (author)zmxninja2012-02-18

oh yeah and btw; it hasnt got enough power. let me mod it and ill post when im done; oh yeah and what do you think of my gearbox

Lowney (author)zmxninja2012-02-18

Oh yeah, I was going to put a comment but I forgot! It's nice, pretty compact and such. If I had to suggest an improvement then maybe the stand could be made a little bit less skeletal but overall it's pretty good

zmxninja (author)Lowney2012-02-19

lol; didnt i write its for use without the stand

H1T4TCH1 (author)2011-09-05

Hey Lowney, check my gearbox:

It has just been posted!

I know you problably won't like it because you can not see how it works, but I just wanted to show 'ya it (:

It's made for functional purposes.

super knex builder (author)2011-08-21

I can't make it any way, I don't have the parts

super knex builder (author)2011-08-20

you should make an ible on this

The design is so basic it doesn't really warrant a full instructable, however, if you're struggling just pause the video, and there are some photos in the comment section :)

super knex builder (author)2011-08-19

can I use a different motor?

Yeah, this is compatible with all the motors, but they all have varying torque levels so you could have more/less levels than mine :)

sizzam960 (author)2011-06-02

put vegetable oil on it it makes it a ton more faster i did it with mine which is heavily modified with a huge motor attached to it and it went at least as fast as 7000 rpms

Lowney (author)sizzam9602011-06-03

awesome, if you put a video up on youtube or something then that would be cool. My youtube is "Lowneification" so you could send a link to my inbox there if you upload it :D
Check out my Youtube channel too, it's got some cool non-k'nex stuff there :P

sizzam960 (author)2011-06-02

what i mean by heavily modified is i added 2 levels and it goes insanely fast

Lowney (author)sizzam9602011-06-03

Cool, I guess your motor has more torque than mine, mine could never power a gearbox that big XD

qwerty987 (author)2011-04-15

here in New Mexico a normal day is 35 to 40.5 degrees Celsius.

qwerty987 (author)2011-04-15

you know what a 1973 lotus europa is? I have one

aleceatsfood (author)2011-01-26

sweet i made it into a fan thanks for sharing!

Lowney (author)aleceatsfood2011-01-27

awesome, got a picture? :D

aleceatsfood (author)Lowney2011-02-01

here it is!

Lowney (author)aleceatsfood2011-02-02

haha, that's brilliant! But if you were wondering how to get the lower fan without it hitting the floor, I used white feet on the bottom (easy to see in the video), just a heads up if you didn't know :)

aleceatsfood (author)Lowney2011-02-02

yeah I kindof saw that but then was a little 2 lazy to do that. you can still see the grey rod spin but just not a little fan on the bottom!

aleceatsfood (author)Lowney2011-01-29

yeah um i took the motor of buy ill put in back on. i knind of uses the fan blade from killer safe kracker. but yes ill get some pics

factknowhow (author)2010-03-18

why dont videos work on this site?


Owenmon (author)2009-11-04

Big whoop, did this with big yellow gears and small blue ones years ago. =P

Oblivitus (author)2009-06-28

It's a fan!, lol. Seriously though, it's nice, but I think that you could make this about half the size while still working the same.

Lowney (author)Oblivitus2009-06-29

Yeah this is a prototype: I'm making it smaller now. It's still a nice idea for windmills, cars (big ones) or even roller coasters and guns (like this one

Lowney (author)Lowney2009-06-29

Also I quite like it like this as you can see the inner workings well. I think it looks quite nice when spinning, particularly with the two fans. This will be used on my V8 engine!

Oblivitus (author)Lowney2009-06-29

Yeah, and you really could use this as a fan for cooling off, try putting some panels on it. :)

Lowney (author)Oblivitus2009-06-29

Yeah but the blade doesn't really spin fast enough. Besides are you American? Because America has MUCH hotter weather than in Britain, so I don't really need a fan.

Oblivitus (author)Lowney2009-06-29

Yeah, I hear that europe is a pretty mild place, where I live the temperature ranges from as low as -30 degrees farenheit in winter to as hot as 90 degrees farenheit in summer. How cold/hot does it get in Britain?

Lowney (author)Oblivitus2009-06-29

for us 24 degrees (celcius) is considered VERY VERY hot, although we are having one of the hottest summers to date. Where in America do you live?

Oblivitus (author)Lowney2009-06-29

24 degrees celsius!? That's only 75 degrees farnheit! How cold does it get there? I live in the New England by the way.

Lowney (author)Oblivitus2009-06-30

Cold? That's boiling for us mate! I think we are hitting 32 by friday though

Oblivitus (author)Lowney2009-06-30

No, I didn't say that that was is cold, I asked how cold it gets where you live. I consider less than 40 degrees fareinheit to be cold, 40-60 is cool, 60-75 is warm, and 75 on is hot.

Lowney (author)Oblivitus2009-06-30

Probably for us it's boiling and for you it's luke warm. There (we have gone a bit off topic haven't we lol)

Oblivitus (author)Lowney2009-06-30

Yeah, what instructable is this again?, lol.

Lowney (author)Oblivitus2009-07-03

No idea :D

andross52 (author)Lowney2009-08-01

Ha! Down it Texas it gets to 104 degrees every summer. :)

Lowney (author)andross522009-08-02


Pizzapie500 (author)Lowney2009-10-23

Gasp i wish i lived there. Where I live in the summer the highest it gets in full sun is about 110 farienhiet but that was last year this year it was 102. The coolest it gets is 0 if i'm lucky. Last year the coolest it ever got was 15.

TwistedParadox (author)Lowney2009-07-03

Shoop da Woop

Lowney (author)TwistedParadox2009-07-03

Hehe, problem is I have a duke of Edinburgh camping trip on wednesday and thursday, and alton towers on tuesday, so I hope it is not too hot, just mild!

knexguy (author)Lowney2009-06-29

32C at the moment :)

About This Instructable



Bio: I make instructables. I also have a YouTube channel at!
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