Involute teeth
Standard profile with a 20° pressure angle.
Gear pair to 3D print
Generate two meshing gears with involute teeth: choose the module, number of teeth, thickness and bores. Shows the center distance. Free.
- Free
- No sign-up
- STL and 3MF
- Millimeter precise
- Runs in the browser
About the gear pair generator
Gears that really work need the involute profile and the same tooth size (the module) on both. This generator computes both gears from the module and tooth counts, with a little backlash so they do not bind.
The center distance is shown in the part name, and an optional base with two pins puts the gears in the right position for testing. The gear ratio is one tooth count divided by the other.
What you can adjust
Module
0.5 to 4 mm (the tooth size).
Two sizes
8 to 150 teeth each, with a shaft bore.
Base with pins
At the right center distance (optional).
Ideas for use
- DC motor reduction
- Toys and automata
- Clocks and mechanisms
- Physics and robotics classes
- Replacing a broken gear
How it works
- Choose the module, the teeth of each gear and the thickness.
- Click "Create in the editor": both gears open ready.
- Print them flat and mount them at the indicated center distance.
How to print
- Material
- PETG or PLA (nylon for load)
- Layer height
- 0.12 to 0.2 mm
- Walls
- 4 perimeters
- Infill
- 40 to 100%
- Supports
- Not needed
- Module 1.5 or larger prints well with a 0.4 mm nozzle.
- 0.1 to 0.2 mm of backlash prevents binding.
- Silicone grease reduces noise and wear.
FAQ
How do I compute the shaft distance?
It is module × (teeth 1 + teeth 2) ÷ 2. The generator shows it in the part name.
Does it mesh with a store-bought gear?
Yes, if it has the same module and a 20° pressure angle, which is the standard.
What is the gear ratio?
Teeth of the larger gear ÷ teeth of the smaller. With 20 and 40 teeth, the ratio is 2:1.
Is it free?
Yes. The maker and the editor are free and run in your browser. Without an account, the project is kept for 48 hours; with a free account, it is kept in your account.
Which format do I download?
3MF (recommended: keeps colors and opens directly in Bambu Studio, OrcaSlicer and Creality Print), STL or OBJ, always in millimeters.
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