Model a Simple Mechanical Part for Free With FreeCAD
Parametric modelling helps make dimensions and design changes explicit.
The aim is to help you complete one clear task, recognize what needs verification, and avoid the most common mistakes. Work through the checks in order, then use the real-world example to apply them to your situation.
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1. Choose an appropriate project
FreeCAD is free and open-source parametric CAD software. It can model designed objects and parts, but accurate engineering work requires knowledge of materials, tolerances and safety.
2. Sketch a controlled outline
Start with a simple rectangular bracket or storage tray. Define dimensions and constraints before extruding. A constrained sketch is easier to change predictably than a collection of manually dragged lines.
3. Build and revise features
Add a pad, pocket or hole according to the current documentation. Change one dimension and confirm the model updates as intended. Maintain clear feature names so future edits remain understandable.
4. Export with limits in mind
Save the native project and export an appropriate neutral format for downstream use. A visually plausible model is not proof that a printed or machined part is safe under real loads.
Verify the source before acting
For the definitions, current capabilities or rules behind this topic, use the original source below. Features, eligibility, safety requirements and local laws can change. A guide cannot replace a provider's official instructions or qualified advice for a consequential decision.