Flywheels and Pulleys, Including Pulley Blocks

China dominates US import supply of flywheels and pulleys, with Mexico and Japan also significant sources, making Section 301 exposure a key landed-cost consideration for procurement teams. The US tariff schedule subdivides this heading by material and geometry: gray-iron awning or tackle pulleys under 6.4 cm diameter (8483504000), grooved pulleys (8483508030, 8483509040), flywheels (8483506000), and catch-all pulley block lines (8483508080, 8483509080). Flywheels serve energy-storage and rotational-smoothing roles in engines and industrial machinery, while grooved pulleys are critical to belt-drive systems across manufacturing, HVAC, and agricultural equipment. Correct classification hinges on whether the article is a flywheel, a grooved pulley, or a plain pulley block, as each maps to a distinct 10-digit line with potentially different duty treatment.

AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.