Knex Ball Machine Lift: Triple Moving Arm Lift





Introduction: Knex Ball Machine Lift: Triple Moving Arm Lift

Hey everyone,

Here are instructions for the Knex Triple Arm Lift (a knex ball machine lift).

The lift is quite easy to make and rotates very smooth when the instructions are carefully followed. As you can see by the title, the lift makes 3 separate movements when only 1 (6V) motor with 2 dubble A batteries is required.

The lift can also handle multiple knex balls at one time thanks to a little ball dispenser that is connected to the same motor that rotates the lift.

Make sure to check out Step nr 1 to see if you have all the special pieces you need to make this lift, (like Micro Knex pieces, the big green gear, etc...).

If there are any complains, questions or problems about the lift, please tell me in the comments below.

Thanks for watching, building,

Thibault Art.

Step 1: Special Pieces You Need:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

Step 9:

Step 10: Very Important Step:

Make sure that all 3 oranje connectors are going upwards. Once you're sure, you can take the 3 connectors of.

Step 11:

Step 12:

Step 13:

Step 14:

Step 15:

Step 16:

Step 17:

Step 18: Another Important Step:

Make sure that you push the little button of the motor to the right.

Step 19: Third Important Step:

When the 2 rotating imputs are perfectly horizontal, make sure that the little ball dispenser is in the same position as shown on the picture.

Step 20: Go Ahead and Try It Out!



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That is a really cool ball machine lift! May I ask where you got the special green gear from? I can't find where to get one :/

Thanks for your comment! You can buy one of those green gears on the "K'NEX User group" site. here's a link if you're interested:

I would recommend that you hurry though. It's a knex piece that hase been discontinued a while ago and they are almost sold out.

Unfortunately, the gear isn't available to the USA or Canada... Do you know of any other way to use maybe a large yellow gear?

Oh, well I think there is a way to make this lift work with a Large yellow gear. And if you have a bit of experience with Knex, it shouldn't be to hard.

I can send you a picture tomorrow with (maybe) a solution to this problem if you would like?

I love the things people make out of K'NEX, especially ball machines and lifts! Excellent work, thanks for sharing.

No problem, I'm happy you like it :).

It's not an efficient lift, but Who Cares! :D
This is the most beautiful one I have seen so far. Mesmerizing movements and great instructions!
Keep it up!

True, it is indeed not the most efficient lift I've ever made XD.

Thanks :).

I like all of these ball machines. You are very talented in making ball machines.