Planetary Gear Fidget

A print-in-place planetary gear set to spin with your thumb

One solid body, no colors. Works with every slicer.

Presets
Shape
mm

Bigger teeth are stronger and print more reliably; smaller teeth turn smoother.

mm
mm

Gap between the teeth. Raise it if the gears are stuck.

Middle
Colors
Advanced
°

Angle of the herringbone teeth. More angle holds the gears in better but makes them stiffer to turn.

Two example settings, each from two angles. These are 3D renders of the model this page generates, not photos of prints.

Planetary Gear Fidget, default settings (3D render)Planetary Gear Fidget, default settings, closer view from above (3D render)
Default settingsOutside: Round · Middle: Text · Diameter 60 mm · Planets 4 · and 1 more setting
Planetary Gear Fidget, keyring 40 (3D render)Planetary Gear Fidget, keyring 40, closer view from above (3D render)
Keyring 40Outside: With keyring loop · Middle: Symbol · Symbol: Heart · Diameter 40 mm · and 2 more settings

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About this generator

Gears that turn the moment they come off the bed: spin the ring and watch the planets orbit the sun.

How to use

  1. Pick a size and the number of planets.
  2. Add a short text or a symbol for the middle.
  3. Print flat, as exported, without a brim.
  4. Twist the sun and ring against each other a few times to free the teeth.

Printing tips

  • A good first layer matters most: elephant's foot can glue the teeth together. Lower the first-layer flow if they stick.
  • 0.2 mm layers or finer.
  • No brim and no supports.

Helpful guides

Frequently asked questions

The gears are stuck.

Hold the ring and turn the sun firmly a few times. If it won't free up, raise Clearance by 0.05 mm and print again.

Why the V-shaped teeth?

They are herringbone teeth. The V holds every gear in place up and down, so the set needs no cover.

Why do the tooth counts change?

A planetary set only fits together with certain tooth counts. The model picks the largest set that fits your diameter and planet count.

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