Free No account needed

GearGen-3D

Free open-source browser generator for seven gear types, with involute teeth and STL, STEP and DXF export

GearGen-3D is a free browser tool for replacement and hobby gears in several gear types. Free and open source (MIT), no account. Exports STL, STEP and SVG. Last checked .

Open GearGen-3D See alternatives

Opens jb07-198.github.io

Screenshot of GearGen-3D

What is GearGen-3D?

GearGen-3D is a free, open-source web app for designing gears in the browser. It has seven gear types: spur, helical, bevel, worm, rack, internal and planetary. For each you set the module, the number of teeth, the pressure angle, the face width, the hub and bore diameters and type-specific values such as the helix angle, the pitch angle of a bevel gear or the number of planets, and the app computes involute tooth profiles and shows the result in a live 3D preview with the vertex and face count and the bounding box.

It checks your values for problems before export, keeps the settings in the URL so you can share a gear by link, and can save or load a configuration as JSON. The File menu exports STL for printing, STEP for CAD and a 2D DXF. Everything runs in the browser with no account and no backend. The interface is in English, French and Arabic.

It is a new project on GitHub under the MIT license, with a small number of stars so far.

What you can make

  • Spur and helical gears
  • Bevel and worm gears
  • Racks and internal gears
  • Planetary gear sets

How to use GearGen-3D

  1. Open GearGen-3D and pick a gear type
  2. Set the module, number of teeth, width, hub and bore
  3. Check the 3D preview and any warnings
  4. Export the STL from the File menu and slice it

What you'll need to print it

Filament and parts that suit what you make with GearGen-3D.

PETG

Digital calipers

M3 heat-set inserts

Also handy

Filament dryers and dry boxes

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GearGen-3D pros

  • Seven gear types in one free tool, including planetary sets
  • STEP and DXF export besides STL, for further work in CAD
  • Settings saved in the URL and as JSON for sharing

GearGen-3D cons

  • You need to know gear terms such as module and pressure angle
  • New project with little use or testing so far
  • The license covers the code, not whether you may sell printed gears

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