Introduction: Knex 'wheeled Crankshaft' Ball Lift

Picture of Knex 'wheeled Crankshaft' Ball Lift
This lift in powered by a large crankshaft which is what I had in mind when building the 'raiser' ball lift. Because there's no rods long enough to cover the height I wanted, wheels are used to support it.


Step 1: Parts You'll Make

Picture of Parts You'll Make

Each piece is a step (there is one hidden at the top).

Step 2: Main Scaffold

Picture of Main Scaffold

This will be the main scaffold. Notice how there are no red rods connecting the middle, and how some rods (tagged) are different sets of pieces.

Step 3: Additional Scaffold

Picture of Additional Scaffold

A quick addition to the previous step. I just didn't want too much in one step.

Step 4: Aligner

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This makes sure the ball holder doesn't move away from the entrance track.
The larger rod must be a 'gold rod'. (They're the same size as a red rod, but come with specific spacing.)

Step 5: Wheel Supports

Picture of Wheel Supports

These support the wheel when they go up and down. Notice the gap in them.

Step 6: Adding the Wheel Supports

Picture of Adding the Wheel Supports

Remember how you had to have a different version of the red rod? This explains it!

Step 7: Ball Aligner Aligners

Picture of Ball Aligner Aligners

These parts help align the wheel aligners, and the more complicated part is the exit track.

Step 8: Adding Those Pieces

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Add them where you see them in the picture. Check the orientation.

Step 9: Ball Holder

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This is the ball holder. The wheels align them, the rod (above it) attaches to the crankshaft, and the connectors (below it) aligns it.

Step 10: Add the Ball Holder

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Easy storage, and better done now than later. Make sure the rods align with the wheel.

Step 11: Crankshaft Pieces

Picture of Crankshaft Pieces

This is double layer, but you only need a single rod for the second layer. You don't need these exact wheels for a counterweight, but you do need a counterweight.

Step 12: Adding the Crankshaft

Picture of Adding the Crankshaft

Just 8 connections.

Step 13: Motor Part

Picture of Motor Part

A small addition to the scaffold which holds the motor.

Step 14: Adding the Motor Piece

Picture of Adding the Motor Piece

Just 8 connections (depends what counts as a connection).

Step 15: Extra Counterweight

Picture of Extra Counterweight

Because you can never have enough counterweights.

Step 16: Entrance Track Mechanism

Picture of Entrance Track Mechanism

There must be gold connectors.

Step 17:

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Just 2 connections.

Step 18: Entrance Track Floor

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Make this 'white floor' with a gap in it to align with the entrance track. Don't forget the 4 pieces above.

Step 19: Adding the Entrance Floor

Picture of Adding the Entrance Floor

Use the extra pieces in the previous step to attach the white floor. Also use the Y-clips.

Step 20: Finished!

Picture of Finished!

You're finished! If you plan on increasing your floor, causing momentum, add the pieces in the second 2 pictures to slow them.


TahaA1 (author)2014-12-30

the video was a nice addition because it showed how the crankshaft worked when it carried the balls

sandroknexmaster (author)2013-08-03


knexpert#10829476 (author)2013-08-01

Great lift!

Good job! A great improvement over the old raiser lift.

I also like the way you don't just make the crank go up and down, but use the whole circle of motion to get the most height out of a limited length!

pwubax 18 (author)2013-07-28

Awesome sauce

About This Instructable




Bio: I'm into knex ball machine stuff. My favourite parts are lift/element hybrids, probably because I tried building a perpetual ball machine. It didn ... More »
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