Real involute gears for 3D printing, from a 6-tooth pinion to a 200-tooth wheel. Pick the teeth and the module and the editor works out the pitch, outer and root diameters and the centre distance to the gear it meshes with. Backlash is built in as print clearance, so a pair turns freely straight off the plate.
Before you export anything, open the technical drawing: front and side views with every diameter, the bore and the hub dimensioned, plus a data table. Looking at it is free, so you can check the gear against your shaft and housing first and only take the file once it's right.
The editor
The Gear Generator editor: settings on the left, the model updates as you change them.
All settings
- Gear type - Spur, Helical, Herringbone, Rack
- Teeth - 6-200
- Module - 0.5-6
- Face width - 1-80 mm
- Backlash (print clearance) - 0-0.6 mm
- Mating gear teeth - 6-200
- Second gear on the axis - No, Yes
- Second gear type - Spur, Helical, Herringbone
- Second gear teeth - 6-200
- Second gear module - 0.5-6
- Second gear width - 1-80 mm
- Its mating gear teeth - 6-200
- Bore - 7 options
- Bore size - 1-60 mm
- Flat depth - 0.1-5 mm
- Keyway width - 0.5-16 mm
- Keyway depth - 0.2-8 mm
- Hub diameter (0 = none) - 0-120 mm
- Hub length - 1-60 mm
- Set screw - None, M2, M3, M4
- Nut trap - Yes, No
- Lightening - None, Holes, Spokes
- Holes / spokes - 3-12
- Rim under the teeth - 1-20 mm
- Rack length - 10-400 mm
- Rack body height - 1-40 mm
- Mounting holes - 0-12
- Mounting hole diameter - 1-12 mm
- Color - any colour
- More options - No, Yes
- Helix angle (°) - 5-45
- Helix hand - Right, Left
- Profile shift (x) - -0.6-0.8
- Addendum (modules) - 0.5-1.3
- Dedendum (modules) - 1-1.6
- Root fillet (modules) - 0-0.4
- Tooth chamfer - 0-3 mm
Printing
Print gears flat, face down, with 3 or more walls. The rack lies on its side with the tooth profile on the plate. PLA works for light loads, PETG or nylon for anything that runs a while.