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SITCSection 7
U.S. imports of flywheels & pulleys (including pulley blocks) (SITC 74850) totaled $56.8M in April 2026, traded with 49 countries.
Importers of Flywheels & Pulleys (Including Pulley Blocks) paid $10.1M in duties in April 2026 — an effective duty rate of 21% on $48.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataFlywheels store and release rotational energy in engines and presses, while pulleys and pulley blocks redirect or multiply mechanical force in lifting, conveying, and tensioning systems — giving this heading relevance across construction equipment, marine, and industrial machinery sectors. Material and size differentiate commercial grades: cast-iron flywheels for large reciprocating engines versus lightweight composite pulleys for high-speed conveyors occupy very different market tiers. Importers should confirm whether articles are classified as complete assemblies or as parts, since that distinction can shift the applicable duty treatment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A pulley block presented with its sheave, frame, and hook as a ready-to-use lifting assembly is generally classified as a complete article under this heading. If the sheave or frame is imported separately as a replacement part, it may fall under a parts provision. The intended use and state of assembly at the time of importation are the key classification factors.
Heavy equipment manufacturing, marine engine rebuilding, and industrial conveyor system maintenance are the primary demand drivers. Aftermarket replacement pulleys for mining and aggregate processing also represent a significant import segment, particularly for high-wear applications requiring hardened or ceramic-coated surfaces.
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Monthly import values over time