Evolvent Design 3D Gear Generator
Spur gear generator from a gear specialist; STL download unlocked via Patreon
Opens evolventdesign.com
About Evolvent Design 3D Gear Generator
Evolvent Design is a gear engineering company known for its online gear calculators, and its 3D Spur Gear Generator brings that background to 3D printing. You design a custom spur gear in the browser by setting tooth count, module, pressure angle, bore and keyway details, with a preview as you go.
Exports cover SVG and DXF for 2D work such as laser cutting, and STL for 3D printing. The 2D files are available straight away, but the STL download is unlocked with a code that the company's Patreon supporters receive, so plan on a small subscription if you want printable files. Professional users are pointed to its separate GearCalculators software.
It suits users who value accurate involute geometry and are happy to support the developer. If you only need the occasional printable gear for free, the MakerWorld and STLGears options may fit better.
What you can make
- Spur gears
- Keyed gears
- 2D gear profiles
How to use it
- Open the gear STL generator
- Set teeth, module, pressure angle and bore
- Check the preview
- Enter your Patreon code and download the STL
Good
- Accurate involute geometry from a gear specialist
- Keyway and bore options
- Free SVG and DXF export
Not so good
- STL download needs a Patreon subscription
- Spur gears only
What you'll need to print it
Materials and parts that give the best results with Evolvent Design 3D Gear Generator.
PETG for functional and outdoor prints
PETG handles heat, sunlight and repeated flexing better than PLA, so Gridfinity bins in a hot garage or signs mounted outdoors keep their shape.
- Bambu Lab PETG BasicUpgraded formula that Bambu says matches PLA Basic for strength while staying impact-tough; low price per spool in multi-roll bundles.
- Polymaker PETGHigh-flow replacement for PolyLite PETG: strong, low-odour and quick to print.
- Overture High Speed PETGGood-value PETG in a large colour range for functional parts in bulk.
M3 heat-set inserts and installation tips
Brass heat-set inserts give printed parts real metal threads that survive repeated screwing, and a dedicated insertion tip keeps each insert straight and flush.
- ruthex M3 threaded inserts RX-M3x5.7 (100 pcs)Brass inserts made for 3D-printed plastic, with matching ruthex soldering-tip sets.
- CNC Kitchen Heat Set Insert M3 x 5.7 (100 pcs)Double-knurled, lead-free brass; CNC Kitchen also sells an installation tip set for T18/900M irons.
- Bambu Lab Heat-Stake Nut Tool Tip SetInsertion tips with an optional USB-C soldering-iron bundle; pairs with Bambu's M3 brass inserts.
M3 screw assortment
M3 is the default fastener size for printed enclosures, hinges and mounts; a sorted kit of lengths saves a hardware-store trip whenever a model calls for bolts.
- Bambu Lab Fastener KitMixed self-tapping and machine screws with nuts, matched to Maker's Supply projects.
- Hilitchi M3 socket head cap screw assortment kitClassic boxed M3 assortment with nuts and washers in many lengths.
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