What is Model-Based Definition?
3D model that carries dimensions, tolerances, and annotations instead of or alongside a 2D print.
Ø40 ±0.02 · lives on the model
Model-based definition puts tolerances…
Write it in your own words in the app.
In real work
Model-based definition on the valve body: GD&T lives on the solid, not a separate PDF traveler.
In the illustration
The turntable rotates and the dimension and tolerance flags turn with the faces they are pinned to; the 2D print beside it slides away into a drawer.
Convert the bracket drawing to model-based definition in your shop-floor software: dimensions and tolerances on the 3D model, and the two notes that still need a 2D sheet.
Try it now
The fastest way to learn a word is to use it. Open this line in the agent you already work in and watch what it does. Change the tool to the one you use.
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01Practice
Make it stick
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02Verify
Prove you know it
Pass the quiz and keep it in a Skills Wallet you can share with anyone who needs proof.
03Career
Find the work that uses it
See which roles lean on this vocabulary, and what they pay in year one.
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