Orbital Sphere - Kinetic Marble Run

Orbital Sphere - Kinetic Marble Run

The Orbital Sphere is a mechanical desktop sculpture designed around an organic, interlocking infinity loop path. This model splits a continuous 3D track across two interlocking hemispheres, held firmly in place by a hidden, internal hexagon alignment block.

Note: Make sure the marble size is accurate, not too tight or loose. I recommend putting more than one marble in there

Features & Design Spec

• Design: Clean, modern aesthetic that fits on a desk.

• Internal Alignment: Features a hexagon alignment core to lock the two halves together with friction. Glue is recommended but optional

• Optimized for 16mm Marbles: Designed around 16mm marbles. Check out these 3d printable marbles if you don’t have any

Print Settings 

Because this model features organic, curving 3D paths around a sphere, it requires supports to print properly.

• Supports: Required. Tree Supports are highly recommended, as they navigate the curved outer geometry easily and pop out of the track channels cleanly.

• Orientation: Print both hemispheres flat-side down on the build plate. (as oriented)

• Material: Any would work. Beware of tolerances

• Post-Processing: Ensure the lower track channels are thoroughly cleaned of any leftover support to give the marbles the best possible pathing. Sanding it down can help if the track is too tight.

• Assembly: Insert the marbles before you assemble the two halves. Insert connector into one half and press in before aligning and inserting the other half onto the connector. Or use common sense.

More Marble Runs

Check out my other marble runs:

© 2026 Facet Printworks. All rights reserved. This model is published under the Creative Commons - Attribution (CC BY) license. You are free to share, remix, tweak, and build upon this work, even commercially, as long as you provide appropriate credit to the original creator.