spur gear generator
Spur gear generator
Make a 3D printable spur gear: set the teeth, module, face width, bore and hub, then download the STL free. Involute teeth, D bore and set screw.
Need more than sizes?
A matching gear at the right centre distance, a keyway instead of the D, spokes to save filament. Describe it, and Voloom builds it from your sizes.
Good to know
Two gears mesh when they share a module and a pressure angle (20° here). Their centres sit (teeth of one + teeth of the other) × module ÷ 2 apart: two 20-tooth gears of module 1.5 are 30 mm apart. The teeth are thinned by 0.15 mm so printed gears do not bind.
How it works
- 1Set the sizes. The spur gear rebuilds when you let go of a slider.
- 2Turn it in the preview and check the overall size.
- 3Download the STL or 3MF, one file per part, and slice it.
What you can change
Teeth: 8 to 80.
Module: 0.5 to 5 mm.
Face width: 3 to 25 mm.
Hub diameter: 8 to 30 mm.
Hub height: 3 to 30 mm.
Bore: 2 to 12 mm.
When sizes are not enough
This is a real parametric model, built on a CAD kernel, not a mesh stretched to fit. Walls stay the thickness you set when the spur gear grows.
For anything the sliders do not cover, such as ports in the right places, mounting holes, text or a logo, describe it to Voloom. It starts from these sizes and builds the part from scratch.
About STL
STL (Stereolithography). The default 3D printing format since 1987: a bare list of triangles. Every slicer reads it, but it has no units, no color, and no parts.
Units: None in the file. Slicers read the numbers as millimeters. Up axis: Z. Opens in Bambu Studio, PrusaSlicer, Cura, OrcaSlicer, and Blender.
Questions
- Is the spur gear generator free?
- Yes. You get 3 runs a month without an account. Sign in with your email, free, and there is no limit.
- Do I need an account?
- No. Change the sizes and preview as much as you like. Downloads count toward the free runs; signing in, free, removes the limit.
- Can I add cutouts, holes or a logo to the spur gear?
- Yes. Use “Describe the rest” under the preview. Voloom takes your sizes into a prompt, you add what you need in plain words, and it builds a new parametric model you can keep editing.
- Can I get a STEP file?
- Yes, from the editor. Open your spur gear in Voloom and download STEP on the Maker plan, for Fusion, SolidWorks or FreeCAD.
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