Joints (Fusion 360)
Fusion 360's component-to-component motion constraint — Rigid, Revolute, Slider, Cylindrical, Pin Slot, Planar, Ball.
Definition
Joints define one motion relationship between two components. Unlike SOLIDWORKS mates (multi-mate constraints stacking into final position), Fusion joints solve for position and DOF in one definition.
Joint types: Rigid (no motion), Revolute (rotation around an axis), Slider (translation along an axis), Cylindrical (rotation + translation), Pin Slot, Planar (2D motion), Ball (3 rotational DOF). As-built joints fix two components in their current relative position.
Why it matters
Joints determine assembly motion. A mechanism without joints can't simulate. Wrong joint type produces mechanisms that move but not as intended.
Common pitfalls
- Confusing joint origin with component origin — joint snaps to unexpected point.
- Using As-Built Joints liberally — components can't be repositioned later without breaking.
- Forgetting joint limits when motion exceeds the physical range.
This concept is a core structural element of the Fusion 360 drafting and engineering environment developed by Autodesk. Autodesk's cloud-native unified design-and-make platform — parametric/direct hybrid modelling, CAM, sheet metal, simulation, electronics, and generative design in one subscription.
Relevant Fusion 360 FAQs
❓ Is Fusion 360 truly free for personal use?
Yes, but with restrictions. The personal-use tier is for hobbyists with under $1k/year in revenue from Fusion-created work. It limits active documents (10 editable at once), removes simulation/generative-design/electronics/extensions, simplifies CAM (no 5-axis, no multi-setup), and has restricted export options. Autodesk has progressively narrowed the free tier; verify current terms before relying on it commercially.
❓ What's the difference between Fusion 360 and Fusion Industry?
There is no separate 'Fusion Industry' product as of writing. 'Fusion 360' is the unified product. Extensions (Manufacturing, Simulation, Generative Design, etc.) add capability. Autodesk has also branded vertical packages (Fusion 360 with Inventor capability) at times; consult current Autodesk pricing pages.
❓ Can Fusion 360 work offline?
Yes — with caveats. Fusion caches files locally and supports a 'work offline' mode for up to 2 weeks. Cloud render, generative design, electronics simulation, and forced sync features require connectivity. For continuous offline work, Inventor is a better fit.
⚡ Concept Self-Test
🎓 Recommended Practice Lessons
Step-by-step practical exercises and certification-aligned paths chosen by our editors to master this concept:
Fusion 360 Professional Design & Engineering Specialization
Autodesk Certified Professional - Fusion 360 Exam Study Guide & Mock Practice
🌳 Semantic Crossroads & Navigation Pathways
Trunk-Branch-Leaf ModelCore glossary, interactive graph, and domain-wide concept index.
Parent design environments and platforms implementing this method natively.