U.S. imports of Parts for Electric Motors, Generators, Generating Sets & Rotary Converters (HS 850300) totaled $370.7M in August 2026, imported from 78 countries.
Importers of Parts for Electric Motors, Generators, Generating Sets & Rotary Converters paid $67.5M in duties in August 2026, an average duty rate of 18.49% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataCommutators, stators, rotors, and other dedicated components for the motors and generators of headings 8501 and 8502 are classified here, with the US schedule subdividing by component type, power rating, and end-use application — including dedicated lines for aircraft generator stators and rotors (8503004500), wind-powered generating set parts (8503009570), and AC generator parts (8503009546). Japan and Germany lead US import supply, underscoring the precision-engineering demands of this parts category. Goods of Chinese origin in this heading warrant review for Section 301 applicability, as China is also a significant supplier.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
13.5K import shipments a month
The US tariff schedule distinguishes stators and rotors by the power rating of the motor they serve. Those for motors under 18.65 watts have dedicated lines (8503003500 and 8503007500), while stators and rotors for heading 8501 goods above that threshold fall under 8503006500. Aircraft generator stators and rotors have their own line (8503004500) regardless of wattage. Correct classification requires knowing both the component type and the rated output of the parent machine.
Yes — 8503009570 covers parts of wind-powered generating sets classified in subheading 8502.31. To support this classification, importers typically provide technical documentation confirming the part is dedicated to wind turbine generators, such as engineering drawings, OEM part numbers, or a manufacturer's declaration. General-purpose parts that could serve multiple generator types may not qualify for this specific line.
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Subheading 1 of 1 in heading 8503
Subheading 850300 · $370.7M of $370.7M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8503006500 | Stators and Rotors for Goods of Heading 8501, NESOI | $135.7M | 13.94% | 85.80% | $18.9M |
| 8503009520 | Electric Motor Parts, NESOI | $58.3M | 17.51% | 62.77% | $10.2M |
| 8503009570 | Parts of Wind-Powered Generating Sets in 8502.31 | $57.6M | 28.02% | 98.67% | $16.1M |
| 8503009550 | Generator Parts, NESOI | $50.8M | 20.31% | 72.06% | $10.3M |
| 8503009580 | Machine Parts for Goods of Head 8501&8502, NESOI | $34.2M | 22.79% | 93.93% | $7.8M |
| 8503009000 | Generator Parts Suitable for Use on Aircraft, NESOI | $10.8M | 13.49% | 92.53% | $1.5M |
| 8503004500 | Stators & Rotors for Generators for Use on Aircrft | $4.1M | 8.48% | 69.90% | $347K |
| 8503003500 | Stators and Rotors for Mtrs, Lt 18.65w | $4.0M | 21.77% | 75.57% | $873K |
| 8503009546 | Generator Parts for AC Gens in 8501.64.0021 | $4.5M | 15.28% | 94.01% | $681K |
| 8503002000 | Commutators for Machines in Heading 8501 or 8502 | $3.1M | 14.63% | 93.61% | $448K |
| 8503007500 | Electric Motor Parts for Motors Under 18.65, NESOI | $1.9M | 15.32% | 80.87% | $287K |
Generator Parts Suitable for Use on Aircraft, NESOI
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
China pays 43.7% duty; Japan 7.2%.
customs district
destination
entry
rate provision · imports
16.7% enters free of duty; duty collected equals 18.49% of imports for consumption.
ImportsExports
Imports
$370.7MYoY · free account
Exports
$147.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $4.3B of Parts for Electric Motors, Generators, Generating Sets & Rotary Converters and exported $1.6B.
Through August 2026. Source: U.S. Census Bureau.