This model is a mechanical spinner assembly designed using Autodesk Inventor. The assembly demonstrates rotational motion using a central deep groove ball bearing. The inner ring is fixed while the outer ring is constrained to the spinner body, allowing realistic rotational degrees of freedom. This project was created to practice assembly constraints, grounding, and motion simulation in Inventor. Software Used: Autodesk Inventor File Format: glTF (.glb) Designed as part of mechanical CAD learning and motion analysis practice.