Your 3D Printable Gear Generator — Spur, Helical &
Generate involute spur, helical and herringbone gears as watertight STL, 3MF or OBJ. Set module, teeth, pressure angle, bore, DIN keyway, hub and backlash.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Module 2 with 20 teeth has a pitch diameter of 40 mm and an outside diameter of 44 mm. Meshed with a 40-tooth gear the centre distance is 60 mm and the ratio is 2:1.Open the 3D Printable Gear Generator — Spur, Helical &
Illustration. Open the tool for the real thing.
See it in action
Sample input: Module m (mm) = 2; Teeth (gear) = 20; Face width / thickness (mm) = 8; Helix angle β (°, 0 = spur) = 0. Pressed Generate gear.
What is the 3D Printable Gear Generator — Spur, Helical &?
Printing a working gear needs a real involute tooth form, not an approximation. This generator builds the standard involute profile with the 1.25 module dedendum for any module, tooth count and pressure angle, then extrudes it as a spur gear, a twisted helical gear or a herringbone double-helix gear, optionally with a bore, keyway cut to DIN 6885 and a raised hub.
Add a mating gear and the tool places it at the right centre distance with the tooth phase set so the teeth mesh, showing ratio, centre distance and contact ratio. Backlash is adjustable for FDM or resin. Download one STL with both gears or a print layout, all processed in your browser.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Standard 20°, 14.5° or 25° pressure angle.
Twist angle up to 45°, double helix without axial thrust.
DIN 6885 keyway and optional hub.
Meshed at the right centre distance with correct phase.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This maker tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
Do the gears mesh when printed side by side?
Choose the meshed layout to see them assembled.
Which hand is the helix?
Gear one is right-handed, the mate is left-handed.
What is the maximum number of teeth?
150.
Can I use metric modules only?
Yes, module is in millimetres.
How do I use the 3D Printable Gear Generator — Spur, Helical &?
1. Set module, tooth count and thickness. 2. Choose spur, helical or herringbone. 3. Add bore, keyway, hub and a mating gear if needed. 4. Download the STL.
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Generate true involute spur, helical and herringbone gears with bore, keyway, hub and a. Free to use.
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