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

Check out my Knex Army Knife too!

Hi guys, here are the instructions for my K´nex gearbox.


You can increase speed by approx. 6x compared to the original K'nex motor speed. It packs a punch, the box construction is very strong. I dropped it some times and only 1 thing came off. The gearbox is easily upgradeable to reach higher speeds, but my K'nex motor can't provide more power than what it's now. The gearbox is nicely hidden in a fairly small and strong box.

Pros:

- Colorful!
- Strong
- Compact
- Easily upgradeable
- Looks pretty nice
- 6 times faster rpm compared to the original K'nex motor rpm

Cons:

- Takes some time if you want to change something inside
- You need a pretty strong K'nex motor


Tell me what you think, and don't forget to rate!

Well, let's build this thing!

Video:

Step 1: Piece Count.

This is the excact piece count.

Connectors:

Yellow -------- 7
White --------- 18
Purple 3d ---- 32
Blue 3d ------- 4
Red ------------ 10
Tan clips ------ 8
Blue clips ----- 5


Rods:

Green --------- 86
White ---------- 70
Strong red ---- 3


Misc:

Blue spacers - 20
Big gears ------ 3
Small gears --- 2
Motor ----------- 1

Step 2: Build the Base.

Read all image notes.

Step 3: Make the Walls and Add Them to the Base.

Read all image notes.

Step 4: Make the Axles.

Read all image notes.

Step 5: Make and Add Another Wall.

Read all image notes.

Step 6: Get Your Motor.

Read all image notes.

Step 7: Add the Axles.

Read all image notes.

Step 8: Finish Off.

Read all image notes.

Step 9: You're Done!

Now make 2!

Comments

author
chet.damrill.3 made it! (author)2014-11-15

i made the box and then i remodled it i made it smaller

author
H1T4TCH1 made it! (author)H1T4TCH12014-12-04

Do you have a pic? I'd like to see it!

author
rickmcc made it! (author)2014-09-10

The 3rd (and final) axle does not need the larger yellow gear on it does it? Seems the speed multiplier gears (large yellow drives smaller blue) finishes on the 3rd axle's small blue gear. The yellow gear should not do anything useful should it?

author
H1T4TCH1 made it! (author)H1T4TCH12014-10-23

You are right. I only put it there to be able to extend the box even more if I wanted to. The multiplier indeed finishes on the small blue of the 3rd axle.

author
nm28431 made it! (author)2013-05-17

I built it and powered a fan with it.

author
H1T4TCH1 made it! (author)H1T4TCH12013-09-25

nice man ;) did you like it?

author
nm28431 made it! (author)2013-04-11

awsome gearbox!

author
H1T4TCH1 made it! (author)H1T4TCH12013-05-09

Have you build it yet?

author
H1T4TCH1 made it! (author)H1T4TCH12013-05-09

Thanks man!

author
knexboy586 made it! (author)2013-01-27

i made it and turned on the motor but it went the same speed please help. p.s it had freash batteries

author
H1T4TCH1 made it! (author)H1T4TCH12013-02-01

Make sure you build the insides exactly like it is on the I'ble.

author
TLF93 made it! (author)2013-01-31

nice job it's really cool and do you think if i try to put two more gears on it, will it go even faster

author
H1T4TCH1 made it! (author)H1T4TCH12013-02-01

Yes you could do that, but I think it will slip faster when you connect the final gear onto something.

author
super knex builder made it! (author)2012-07-04

this is a great ible, clear pics and instructions. made mine into a fan

author
H1T4TCH1 made it! (author)H1T4TCH12012-07-13

Thanks man, I did my best at this 'Ible, used a high quality camera.

That's great, there are many uses for it.

author
H1T4TCH1 made it! (author)H1T4TCH12012-07-13

Thanks man, I did my best at this 'Ible, used a high quality camera.

That's great, there are many uses for it.

author
GASSYPOOTS made it! (author)2012-03-24

take the moter outa one and connect em

author
H1T4TCH1 made it! (author)H1T4TCH12012-03-27

I do not understand you.

author
GASSYPOOTS made it! (author)GASSYPOOTS2012-03-27

connect 2 gearboxes

author
zmxninja made it! (author)2012-02-15

Can you help me; I have got a gearbox which can change gears but i cant fit it into a neat little box like yours, can you help?

author
H1T4TCH1 made it! (author)H1T4TCH12012-02-17

It changes gears?

I can help you if you send me 1 or more pictures.

author
zmxninja made it! (author)zmxninja2012-02-19

its one of my ibles, ill put a pic up here anyway

author
H1T4TCH1 made it! (author)H1T4TCH12012-02-23

I see. Well, you can start off by building my creation first, to get an idea of how it all fits together. Then, you can attempt to make a box for yourself.

author
zmxninja made it! (author)zmxninja2012-02-25

i have, 4 times... lol pretty helpful

author
H1T4TCH1 made it! (author)H1T4TCH12012-03-06

This is better. http://www.balmoralsoftware.com/knex/soma/somaset.htm

author
H1T4TCH1 made it! (author)H1T4TCH12012-03-06

Lol. It's all based of this concept: https://www.instructables.com/id/Knex-Cube/ except it's mixed with yellow connectors in my version.

author
patriots8888 made it! (author)2011-09-10

Im goin hook this up to my ferris wheel...

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-10

Is the ferris wheel really heavy, or not? If so, there is a chance that it won't work.

author
patriots8888 made it! (author)patriots88882011-09-11

its relativly lighweight..ill try it today

author
H1T4TCH1 made it! (author)H1T4TCH12012-02-17

How did it work out?

author
patriots8888 made it! (author)patriots88882012-02-17

It ran smoothly for about 10 seconds then spun out of control

author
H1T4TCH1 made it! (author)H1T4TCH12012-02-23

Hmm... Spun out of control? Do you have some more details maybe I can help.

author
patriots8888 made it! (author)patriots88882012-02-23

it was going really fast, the ferris whell tipped over and the motor just made a clicking noise

author
H1T4TCH1 made it! (author)H1T4TCH12012-03-06

Hmm. Try using the second gear instead of the third.

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-11

Ok man, good luck!

author
Orangepanda made it! (author)2011-12-26

hi this is AWESOME!

author
H1T4TCH1 made it! (author)H1T4TCH12012-01-09

Thanks man! Glad you like it :-)

author
cool kid #1 made it! (author)2011-11-13

havent tried it yet but looks like it will work for what im using it for

author
H1T4TCH1 made it! (author)H1T4TCH12011-12-08

Ok! What are you using it for?

author
mahmel made it! (author)2011-09-10

Nice. Perhaps something for ball machine lifts.

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-10

For sure!

author
getoutofhere623 made it! (author)2011-09-07

now make one that slows down 6 times :)

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-08

That is not possible with only K'nex pieces :P

Do you like it?

author
GrandeSwag made it! (author)GrandeSwag2011-09-08

Yes it is..

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-08

Show me.

author
GrandeSwag made it! (author)GrandeSwag2011-09-09

Do the exact same thing you have, but backwards. Small gears to large gears. Easy. :)

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-10

I have a large 'DOH!' moment now... -___-

You're right, and I could also use the biggest yellow gear to make it go even faster. Pity that I don't have one.

author
~KGB~ made it! (author)2011-09-06

nice.

author
H1T4TCH1 made it! (author)H1T4TCH12011-09-06

Thank you (:

author
~KGB~ made it! (author)~KGB~2011-09-07

np.

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