Roller Scale

This CAD model represents a roller scale (rolling ruler) used in engineering drawing and drafting work for measuring and drawing straight parallel lines quickly and accurately. The model includes the main scale body and the cylindrical roller mechanism that enables smooth guided movement across the drawing surface. The design focuses on correct proportions and component structure, making it useful for CAD practice, product modeling exercises, and educational reference. It can be used for rendering, detailing, and basic mechanism visualization.