Bendy Spiral | A K'nex Ball Machine Element

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Bendy Spiral | A K'nex Ball Machine Element

Difficulty: Very Hard

Hello! Here is the final element from my k'nex ball machine 3XODUS. It is a spiral but doesn't use any tubing. This was a big challenge as I had to get the shape and steepness correct or the ball wouldn't roll down! I have made many improvements to it since it was on my ball machine. It is very well supported now. Remember that this is a very heavy element so make sure it is extremely well supported in your ball machine or it will fall off! Want to build it? Let's go!

Featured?! Thank you so much Instructables!

Step 1: Piece Count

Rods: 173
Green - 40
Blue - 31
Yellow - 23
Red Bendy (Yellow size) - 35
Red - 21
Grey - 10
Purple Bendy (Grey size) - 13
Connectors: 153
1 Slot - 6
2 Slot (Orange) - 36
3 Slot - 15
5 Slot - 61
8 Slot - 3
7 Slot 3D - 11
4 Slot 3D - 21
Miscellaneous: 3
Metallic Blue Clip - 1
Y Clip - 2
Total: 329

Step 2: Frame


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Step 3: Railing

This is the hardest part, make sure you follow the steps VERY carefully

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  • Alternate view
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Step 4: Guides and Extras


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Step 5: Path


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Step 6: Extra

Anywhere that the ball gets stuck, put this under the track that is having that problem. Over time, the element should sort itself out. Some places you may have to modify yourself.

Step 7: Finished!

You made it, well done! Please tell me what you think of it down in the comments and share it with your friends, but more importantly, have a great day!