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.

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Step 8: Finish Off.

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Step 9: You're Done!

Now make 2!

Comments

[christophergwinn]

can we do it without the gears i dont have the gears

[Knexmaster69]

Nice but mine is spinning in a square pattern for some reason can someone tell me why?

[pephooh]

is it possible to slower the motor instead of faster?

[dynamite_kid]

Nice I made it faster and changed it for my knex marble machine and it works a treat really cool

[chet.damrill.3]

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

[H1T4TCH1]

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

[rickmcc]

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?

[H1T4TCH1]

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.

[knexboy586]

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

[H1T4TCH1]

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

[TLF93]

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

[H1T4TCH1]

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

[super knex builder]

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

[H1T4TCH1]

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

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

[H1T4TCH1]

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

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

[GASSYPOOTS]

take the moter outa one and connect em

[H1T4TCH1]

I do not understand you.

[GASSYPOOTS]

connect 2 gearboxes

[zmxninja]

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?

[H1T4TCH1]

It changes gears?

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