This series focuses on essential components for e-bike drive systems and structural transmission units. It includes parts such as iron cores, planetary screws, flywheel rings, locking rings, bushings, sliders, bearing sleeves, and gear housings. Designed for lightweight performance, high precision, and fatigue resistance, these components serve vital functions in electric motors, transmission units, reducer housings, and structural supports—meeting the diverse demands of modern electric-assisted bicycles.