Good for
- Prototype gear trains and mechanism mock-ups
- 3D printed toys, models and demonstrators
- A starting point for your own gear in VIZON CAD
Spur gear CAD model
A parametric spur gear with 20 teeth at module 2, giving a 40 mm pitch diameter and a 44 mm outside diameter. The 8 mm thick gear body carries a raised hub with an 8 mm bore and four lightening holes, repeated with a circular pattern so the count is one number to change.
Free to use under CC BY 4.0. Made in VIZON CAD.
Specifications
Solid volume: 9,776 mm³, measured by the VIZON CAD kernel.
Teeth are a straight-flank approximation, fine for prototypes and visuals. For a working gear train, replace the profile with an involute curve.
| Teeth | 20 |
|---|---|
| Module | 2 mm |
| Pitch diameter | 40 mm |
| Outside diameter | 44 mm |
| Face width | 8 mm |
| Bore | 8 mm |
How it was made
This part is 9 parametric features in the VIZON CAD editor. Each line below is one feature in its feature list, so every size can be changed and the part rebuilds.
| Feature | Type | Settings |
|---|---|---|
| Gear profile | Sketch | Top plane · 1 item |
| Gear body | Extrude | New · 8 mm |
| Hub sketch | Sketch | Top + 8 mm · 1 item |
| Hub | Extrude | Add · 6 mm |
| Bore sketch | Sketch | Top + 14 mm · 1 item |
| Bore | Hole | Ø8 · through |
| Lightening hole sketch | Sketch | Top + 8 mm · 1 item |
| Lightening hole | Hole | Ø5 · through |
| Lightening holes | Circular pattern | 4 × over 360° about Z |
Make it your own
- Change the bore by editing the "Bore" hole diameter.
- Make the gear thicker by editing the "Gear body" extrude depth.
- Change the number of lightening holes in "Lightening holes".
Questions about this model
Is the spur gear model free?
Yes. Download it as STEP or STL and use it under CC BY 4.0: free for any purpose, including commercial use, with credit to VIZON.
Can I change the dimensions?
Yes. Open the STEP file in the VIZON CAD editor to add features, or rebuild it from the feature list on this page and change any number.
Which file should I download for 3D printing?
The STL. It is exported in millimetres with Z up, ready for any slicer. Use STEP if you want to keep editing in CAD.
Tools used for models like this
More free CAD models
Design your own part
Sketch it, or describe it with sizes and let the AI write the features.