The Frame Hinge Tube forms the rotating passage that allows two frame sections to pivot smoothly around a shared axis. It provides a guided path for hinge pins and shafts, allowing consistent rotational movement during articulation. The tube manages alignment between connected sections while motion occurs repeatedly during operation. It allows rotational travel without binding when frames open, close, or flex. Its structure manages the load transfer created during pivot action. Provides controlled movement while limiting unwanted lateral motion.Attributes:• Guides smooth rotation without binding during repeated movement cycles.• Distributes rotational forces generated at the hinge point.• Manages load transfer created by frame articulation.Applications: The Frame Hinge Tube is located at frame joint areas where pivot movement is required, allowing connected frame sections to rotate smoothly around a shared hinge axis.