Introduction: K'nex Gearbox
This instructable will show you how to build a K'nex 1 speed gearbox that will make a motor go faster/slower. This is my first instructable sorry if it is unclear and some of the pictures are blurry.
p.s it is based on a gearbox that I found on Youtube its here if you want to see it.
pp.s Give credit to spoonman192
ppp.s remember to use SANYO eneloop Batterys for the motor.
Step 1: The Base
Firstly build the base.
Step 2: The Gears
Now the tricky part, insert the gears as shown.
Step 3: Strengthening the Gearbox
Now to strengthen the gearbox and the basics of the motor.
29 Comments
11 years ago on Step 3
Hey gingernutsjonny, check my gearbox! It has just been posted. It's made for functional purposes and works awesome.
12 years ago on Introduction
hey i found that using the fast gear for around every one turn its around 15!!!!!!on the other (slow option)so thats like if you ue a 1000rpm drill you be getting 15000!!!!!!!!rpm on the other end imaging that on a roller coaster chain lift!
12 years ago on Step 3
amazing love it thanks for the instructions!
12 years ago on Step 3
make a part list please
13 years ago on Introduction
I built this once and it makes the last part spin really fast. then I hooked up my 1350 rpm drill to it and all the pieces twisted up and I had to throw it away but it was worth it
13 years ago on Introduction
i tried building this once and it did not work
Reply 13 years ago on Introduction
I know why: you must have accidental confused the yellow rod with the grey rod. I've got a video of a nice big and open gearbox which shows the inner workings. https://www.instructables.com/id/Ultimate-Knex-Gear-box/
13 years ago on Introduction
The problem with this is that (if it has 3 blue gears) it is pushing the limits of a K'nex engine (except the mains powered one) as more friction is generated and the torque required to get the whole gearbox moving increases dramatically. Because of this I think you'll find that with just 2 blue gears you get similar performance. It's also better for hand cranked stuff like ferris wheels or windmills. I made a gearbox too (check out my account, click my icon) but really big so you can see the inner workings!
14 years ago on Introduction
zomg i cant believe this. ive not seen this thing for ages im spoonman192 i made this years ago before i made my youtube account omg cool for posting it i remember telliung a guy i would but i forgot so thanks!
Reply 14 years ago on Introduction
i have removed my knex gearbox video now so u cant see it anymore this is spoonman192 btw
14 years ago on Introduction
if you wnat a good tranny go to http://www.youtube.com/watch?v=TWiB1bOxCHQ
Reply 14 years ago on Introduction
Haha, that sounds hilarious.
Reply 14 years ago on Introduction
what does
Reply 14 years ago on Introduction
The 'if you want a good tranny' bit.
Reply 14 years ago on Introduction
OHHHHHHHHHHHHH!!!!!!!!!!!!
14 years ago on Step 3
Viddeo please
Reply 14 years ago on Step 3
Sorry but I'm not doing a video for it.
14 years ago on Introduction
make a huge one and see how fast it goes with a speedometer :D
Reply 14 years ago on Introduction
some one did that they got 2400rpm.
Reply 14 years ago on Introduction
tried to make my own, accidently made a 60 second timer :D