Marble Elevator

Video of how it looks after being built:

https://youtube.com/shorts/wvF8NSBeQ0s?feature=share

This model requires minimal hardware:

• 2 bearings, 8mm ID x 22mm OD x 7mm tall
• 2 M4 screws, one 16mm long and the other 20mm long
• 2 M4 nuts
• Sandpaper/tape (optional, depending on your printer's tolerances)
• Small blade
• Marbles (diameter of 14mm [0.55"])

Embed the two M4 nuts into the corkscrew and 6 tooth gear. It should be very clear where they go. Insert the bearing mounted vertically, then insert the 6-tooth gear into it. Secure that through the square crankshaft with the 16mm screw. Once secured, add the handle into the square tubing (either sand or add tape to the square adapter to ensure a tight fit)

Then insert the horizontally oriented bearing near the bottom of the main body. Insert Insert the corkscrew through the top hole and into the bearing and use the 20mm screw to attach the 9-tooth gear to the corkscrew. Ensure the head of the screw does not sit below the base of the main body. You may need to drill out the hole in the 9-tooth gear a little to make the screw sit higher.

Once those steps are done it is complete! insert marbles anywhere on the track, but ensure marbles aren't too large or they will clog up the tubes.

Enjoy!

*As far as the files go, you can import the entire model (called marble elevator.3mf) into your slicer (I use Cura) and then right-click and select ‘ungroup’ to separate the bodies. From there you can manipulate and orient the bodies as needed. All parts are printable without supports (uses bridging in many places). You can also download each file individually if you prefer.