Introduction: Eagle Arm Lift, a Knex Ball Machine Lift

About: Hey! I'm Sandroknexmaster. I like building with knex, especially ball machines. I live in Belgium. I speak Dutch, but also English and French. I hope you like my stuff, and like always comment, rate & …


This are the instructions for the fifth new lift in my knex ball machine Elysium.

It has two entrances and two exits on each side, and a big counterweight in the middle.

This lift works best when integrated in a ball machine (it can be a little flimsy when not in a ball machine).

When you encounter a problem or have a question, you can always send me a message.

Thanks for watching / building!


Step 1: Piece Count

If you want you can count the pieces before you start building.

Here is a list with all pieces included in this lift, named by their original colour:


Green: 70

White: 38

Blue: 147

Yellow: 144

Red: 65

Grey: 16

Total rods: 480


Dark-grey: 48

Light-grey: 22

Orange: 41

Red: 38

Green: 4

Yellow: 53

White: 17

Purple: 158

Blue: 18

Total connectors: 399


Blue spacer: 50

Silver spacer: 43

Tan clip: 2

Y-clip: 22

Small blue gear: 1

Big yellow gear: 1

Medium hub: 22

Medium tire: 22

Motor: 1

Total other: 164

Grand Total: 1043

Step 2: Motor and Gears

In this first part, we will start with the motor and the gears.

Step 3: Counterweight

This counterweight helps pushing the arms up. You can always replace the wheels with something else if you don't have enough of them.

Step 4: Frame

In this step we build two frames that will hold the entrances and exits.

Step 5: Entrances and Exits

In this step we add the entrances and exits for both sides of the lift.

Step 6: Arms

In this last step, we're going to make the arms.

Step 7: Finished!

The Eagle Arm Lift is finished!

Always slide the switch of the motor to the left.

Thanks for watching / building!


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