Introduction: K'nex Spiral Element

Picture of K'nex Spiral Element

An exciting element for any knex ball tower.
Video link at

Step 1: Frame

Picture of Frame

Construct a frame using 12 grey rods and 16 blue connectors. Alternatively you could use purple connectors depending on the situation.

Step 2: The Crossbars

Picture of The Crossbars

Add the crossbars using grey rods, grey connectors and lots of spacers. Put 2 connectors on each end of the rod and add the spacers as shown in the diagram. Spacing is crucial so if you are using something smaller than a standard knex ball you should use less spacers.

x grey rods
2 grey connectors per rod
lots of spacers

Its a bad photo, yeh?

Step 3: The Crosspieces

Picture of The Crosspieces

Add the crosspieces in the pattern 3-2-3-2....

Step 4: Compiling the Crosspieces

Picture of Compiling the Crosspieces

Slide the crosspieces together so that they only just touch. Ensure that the crosspieces all connect together with the pins locking into the rectangular holes in the corresponding pieces as shown in the picture.

(Thats a completely useless photo.  I don't know how enyone could make comething comprehensive from that)

Step 5: Tubing

Picture of Tubing

Wrap the tubing into the spiral ensuring that all the connector pins are used. When you reach the top wrap the tubing around the uppermost crosspieces so that the track is on roughly 45 degrees to allow easy entry for the balls. In the picture I have added an extra length of tubing to make the track smoother as well as two extra crosspieces for support.

approx 1m tubing required

(Is it bending?  YES.  If you can, use some lss-stiff tubing (like the orange stuff))


Linkin_J_Knex (author)2015-09-06

cool element!

Sorunome (author)2010-09-11

Awesome Element!!!!!!!!!!!!!!!!!!!!!!!!!!

erikos kostarikos (author)2010-08-30

You really make good instructions. I think you should make your own 1001-balltower elements book. =P

KnexFreek (author)2010-02-23

 thats awesome!!!!!!!!!!!!!!!!!!!

KnexFreek (author)KnexFreek2010-02-23

 i subscribed

Pizzapie500 (author)2009-09-28

Do you have to use knex tubing cuz it's kinda expensive (for a tube) so is there any alternatives?

yardking (author)Pizzapie5002009-09-29

As yet no other solution to that little issue unless you have a friend who you could get some off. Perhaps you could make the sides out of a curved piece of card but you wouldn't get quite the same effect. Sorry I can't be of any more help but good luck to ya.

Pizzapie500 (author)yardking2009-09-29


Pizzapie500 (author)Pizzapie5002009-09-29

Do u know how many 38 pounds of knex is? Also is 38 pounds for $70 a good deal? Please answer ASAP cuz bidding ends today Also is 38 pounds for 70$ better than Lost Mines:Power Tower Crane Big Ball Factory(Crankin' up the Big Ball) Hyperspace Training Tower Trampoline Tower Command-A-Bot(radio control) For $100?

How come you replied to me with a blank comment

yardking (author)doris50273doll2010-01-06

OMG where?!!

The Jamalam (author)2008-08-17

sweet, its a pity i dont have any roller coaster parts :( 5 stars anyway!

Vynash (author)The Jamalam2008-08-18

wow... I have like 7-8 screaming serpents, and a star burst spinner,and a rippin rocket, and a looping lizzard, and a really really old monster truck set, and some more random k'nex. LoL

apples!!!!! (author)Vynash2008-08-18

Cheese and rice....

Vynash (author)apples!!!!!2008-08-18

Cheese and rice...

apples!!!!! (author)Vynash2008-08-19

I'm waiting to see if anyone gets that...

Vynash (author)apples!!!!!2008-08-19

I don't get it. whats it's meaning?

apples!!!!! (author)Vynash2008-08-19

It rhymes(sorta) with a phrase that expresses extreme shock and disbelief....

DrWeird117 (author)apples!!!!!2008-08-19

I think I know what it is.

apples!!!!! (author)DrWeird1172008-08-19

Then you'd be the first so far....

DrWeird117 (author)apples!!!!!2009-02-24


Vynash (author)apples!!!!!2008-08-19

oh, ok...

yay for randomness!!!!!

That wasn't exactly random, more....suited for all age groups....

i know its just a random thing

The Jamalam (author)apples!!!!!2008-09-12

jesus christ d'ya mean?

apples!!!!! (author)The Jamalam2008-09-18


The Jamalam (author)apples!!!!!2008-09-19

=O =D

Bugman9 (author)2008-11-21

the purple rails and the green rail connectors are from the screamen serpent are they?

yardking (author)Bugman92008-11-21

All of the parts can be found in the "Screamin' Serpent" but thats not the only set that has them.

puffyfluff (author)2008-08-31

The video is awesome. You should make an 'ible for it.

jollex (author)2008-08-17

Very nice, a great ball machine! Finally someone that is as good as Darth Trainman.

The KNex Weasel (author)jollex2008-08-18

Are you kidding me? He's better than Darth some areas, that is (this one included).

jollex (author)The KNex Weasel2008-08-19

I think he's better than Darth Trainman in quality of his components, but Darth Trainman is better in size.

The Jamalam (author)jollex2008-08-18

i think better looking at the video!

Doctor Who (author)2008-08-17

wasn't this on weasel's machine? that's name starts with an I

I_am_Canadian (author)Doctor Who2008-08-17


It's "Enigma", and that phrase actually starts with an "E". I use one made with orange track connectors rather than crossties. I find that particular style easier and more reliable to use. But this one still works too. I personally think both are equally cool.

yardking (author)The KNex Weasel2008-08-18

Living in Australia it is near impossible to get ones hands on orange trackpieces but I am interested in how you made yours.

The KNex Weasel (author)yardking2008-08-18
I shall explain it the best I can:


arrow shot (author)2008-08-17

jollex this isnt a ball machine, if you look, there are 2 rails. 1 rail is on top of the other, so how would the ball stay in XD. cool spiral thoug...could be used for...stuff

It can still be used on a ball machine, though. Check out some of the ones I've made (and some of the others Yardking has made as well) to find the gist of this element.

jollex (author)arrow shot2008-08-18

Maybe if you watched the video or read the instructable you wouldn't make stupid comments like this.

apples!!!!! (author)jollex2008-08-18


The Jamalam (author)arrow shot2008-08-18

centrifugal/ centripetal forces would hold it in, or out in this case

iKill (author)arrow shot2008-08-17

and i quote "An exciting component for any knex ball tower. "

Trauts (author)arrow shot2008-08-17

Because the force pushing the ball outward (centrifugal force - correct me if i'm wrong) keeps it inside the tracks and it won't fall out. If the ball didn't have a rolling start it would just fall out.

dsman195276 (author)2008-08-18

cool, i might make a ball machine one day.

About This Instructable




Bio: I've had K'nex as long as i can remember but it wasn't until I was old enough to have a credit card ... More »
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