Author Topic: Knex connectors & compatibility  (Read 1105 times)

Offline buildermum

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Knex connectors & compatibility
« on: September 26, 2017, 09:07:36 pm »
Hello I'm new  :)
I'm posting for my 9 year old (but secretly for me too).
We, I mean he,  has a large amount of knex and also lego (hope I don't get chucked out for saying lego). I wanted to make the lego move which lead me to technic (which we don't have), which in turn lead me to think technic is similar to knex.  We've always used both separately. And sorry we are novices and at the early stages of building so just getting to moving structures.

I've looked into it and I can see the odd mention of knex bricks which I think look like a lego brick so the two can be connected but I'm not finding it easy to find them to buy. Do they come in a connector set or just the odd one in other sets?
Would welcome any help on connecting the two so we can make better use of our sets.
Also I've read that around £10kg for loose, used lego. Any ideas on what you'd pay for loose used knex per kg as I'd like to add more for Xmas.
Many thanks Courtney

Offline GWorks

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Re: Knex connectors & compatibility
« Reply #1 on: September 28, 2017, 10:30:51 pm »

Hi there Buildermom :) Welcome to KF!


Don't be afraid, we wouldn't kick someone just because they mentioned LEGO. I'm a LEGO fan myself, for example, and I'm still around ;)
A novice, yet eager to learn, that's great! So if I understand correctly, you guys have LEGO, but no LEGO Technic.


Having played with both systems since I was like 4, I'll put down some differences and or opinions about the two:
LEGO Technic:
+ In general a great building system
+ Possible to make mind-blowingly complex mechanical systems
+ Great options to be remote-controlled with motors, etc.
+ Mostly used for vehicles: Trucks, cars, construction vehicles
+ Accurate colours can make models look great
- Expensive, even 2nd hand. Most people know that LEGO isn't sold cheaply
- Many (small) parts that serve a certain purpose (suspension, wheel hubs)
- You need a lot to build big things


K'NEX:
+ Colour coded building. In general, a piece has 1 or 2 colours (there are exceptions)
+ Easy to build big, high AND strong while doing so (K'NEX gave me the knowledge of structure strength that I nowadays use as engineer)
+ Much cheaper when bought 2nd hand. Easy to get a (random) lot of many K'NEX pieces for a good price.
+/- Limited amount of pieces. Great for beginners, frustrating for experts
+ Mostly used for: Ball machines, Roller coasters (Also guns, although I wouldn't promote this myself)
- Below average mechanics possible. Especially when it comes to gear mechanisms
- Standard motors are available, but a decent remote-control system isn't


Talking about the connection between the two systems, I'll start with the following:
Yes, K'NEX does produce bricks that fit the LEGO bricks. The K'NEX bricks however are of extremely low "sticking" quality, even compared to Chinese replicas of LEGO. I'd advice not to actively search K'NEX bricks of any sort, unless they're in a big lot of course.
Still I'll try to explain how the system works: The K'NEX bricks or plates have holes sometimes, which would fit a LEGO Technic pin or axle. K'NEX hasn't got gears that fit well to the brick system. Everything is oversized. They only supply pins that change LEGO to (Micro) K'NEX.
Micro K'NEX uses thinner rods and smaller connectors. It's still used to make supports for a Roller coaster for instance. The disadvantage is that it's a lot weaker. The advantage is that you can build smaller, but still not as detailed as you would with LEGO.


For connecting the two systems what you could do is make some kind of structure with K'NEX and play around it with LEGO vehicles. I would discourage physically connecting them.


I tried to (objectively) summarize the pros and cons of these systems, I hope it has been found useful. Depending on what your son (and you) are interested in, I hope this helps to make a choice. If you have questions about something specific, please keep asking :)


To answer the other two questions:
- K'NEX bricks come usually in normal value tub sets. There are some sets that are Brick-only but they are a mere disaster due to the lack of sticking that I mentioned earlier.
- I'd have no idea about prices per kg. Maybe @Sorunome @Lexi Knex or @TheKnexGuy know more.
« Last Edit: September 28, 2017, 10:38:42 pm by GWorks »
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Offline TheKnexGuy

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Re: Knex connectors & compatibility
« Reply #2 on: September 29, 2017, 02:38:54 am »
- I'd have no idea about prices per kg. Maybe @Sorunome @Lexi Knex or @TheKnexGuy know more.
I have no idea what knex bricks are sold at. I have some, but barely use them, cause they aren't as fun to work with IMO.

I think Legos would work fine in place of Knex bricks, but I don't know if the pins that convert bricks to knex would work in legos.

There is a piece that converts bricks to regular size knex, and I have a few. I can't find where to buy them, cause I don't know what they are called, but they look like this:
My three best things to do:
Minecraft: https://hypixel.net
K'nex
The Blockheads: https://forums.theblockheads.net

Offline GWorks

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Re: Knex connectors & compatibility
« Reply #3 on: September 29, 2017, 03:18:34 pm »
Thanks for providing the picture!
They can be bought here:
> www.knexspares.co.uk/index.php?main_page=index&cPath=21_25

I'm not sure, but my guess is that they fit to LEGO holes as well
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Offline Knex_legend

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Re: Knex connectors & compatibility
« Reply #4 on: September 30, 2017, 08:23:36 pm »
You can also buy knex bricks from a website called    knex user group

Offline www139

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Re: Knex connectors & compatibility
« Reply #5 on: November 05, 2017, 04:12:56 pm »
I've gotten most of my pieces from eBay. There you can get literally thousands of pieces for less than $20. You should be able to find knex bricks there as well, but you really only need a few to convert the knex system to the Lego system. There are even Lego pieces that look exactly like one l bricks (in that they have holes on the top for rod connection  I think you might be able to find some in technic sets but IDK).

Don't worry about mentioning Lego here 😂. I love Legos too, but I for whatever reason build knex more. I used to build Lego a lot but school got in the way and it got replaced with knex since you can build bigger models in less time.

Oddly enough, I recommend looking on knex.com for knex bricks as well. They sell full sets that are all bricks (it sucks, but hey, let's exploit it!) They can be expensive but you'll know what you're going to get better than in eBay. But look on eBay as well. :)

Happy building and welcome to the community!


P.S.  DON'T EVER MENTION KNEX BRICKS! THEY RUINED KNEX!!!!
Just kidding. 😝
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