Create the base disc
Draw a circle about 40 mm in diameter and extrude it to roughly 6 mm with Push/Pull. This disc is the gear body.
Modellieren
Create a simple gear with radial copies
Build a simple spur-gear style model from a base disc and one tooth. You will learn how to place a pivot, copy while rotating and distribute geometry evenly around a centre.
SAStep-by-step tutorial
What you’ll learn
This example is ideal for learning rotate-and-copy. For loaded or precisely meshing drive gears you should later use a calculated involute tooth profile. The workflow is still very useful for prototypes, decorative parts, knobs and simple mechanisms.
Step by step
Model one tooth
Create one small box-shaped tooth at the outer rim and let it overlap the base disc slightly. For a first example, about 6 mm width and 4 mm radial length works well. Match its height to the base disc.
Set the pivot to the centre
Select only the tooth and start Rotate. Place the pivot exactly at the centre of the base disc. Use the centre snap so every copy is truly concentric.
Create radial copies
Enable copy mode with Ctrl and use an angle that matches your desired tooth count. For 16 teeth that is 22.5°. Use the repeat/copy count until the full circle is filled.
Add the centre hole
Draw a smaller circle on the top face, for example 8 mm. Push/Pull it through the gear to cut the centre bore.
Export for 3D printing
Select the complete gear assembly and use Export → STL → Selection only. Check in your slicer that the overlapping bodies are combined into the intended printable part.
Keep learning
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