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HSChapter 85
U.S. imports of parts for electric motors, generators, generating sets & rotary converters (HS 850300) totaled $454.2M in July 2026, traded with 76 countries.
Importers of Parts for Electric Motors, Generators, Generating Sets & Rotary Converters paid $94.2M in duties in July 2026 — an effective duty rate of 24% on $391.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts for Electric Motors, Generators, Generating Sets & Rotary Converters imports of $454.2M in July 2026 ran 24% above the year-to-date monthly average of $365.1M.
Last updated: July 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 shipments/mo
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 · $454.2M of $454.2M
ImportsExports
Imports
$454.2MYoY · Pro
Exports
$135.5MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8503009570 | Parts of Wind-Powered Generating Sets in 8502.31 | $153.5M | 28.02% | 99.46% | $43.0M |
| 8503006500 | Stators and Rotors for Goods of Heading 8501,NESOI | $128.9M | 15.23% | 90.31% | $19.6M |
| 8503009520 | Electric Motor Parts, NESOI | $65.3M | 16.25% | 59.59% | $10.6M |
| 8503009550 | Generator Parts, NESOI | $44.2M | 17.48% | 63.26% | $7.7M |
| 8503009580 | Machine Parts for Goods of Head 8501&8502,NESOI | $35.1M | 26.05% | 93.19% | $9.1M |
| 8503009000 | Generator Parts Suitable for Use on Aircraft,NESOI | $10.8M | 10.03% | 89.40% | $1.1M |
| 8503009546 | Generator Parts for AC Gens in 8501.64.0021 | $4.4M | 24.32% | 94.76% | $1.1M |
| 8503004500 | Stators & Rotors for Generators for Use on Aircrft | $3.7M | 6.31% | 59.70% | $234K |
| 8503003500 | Stators and Rotors for Mtrs,Lt 18.65w | $3.5M | 25.89% | 84.66% | $918K |
| 8503002000 | Commutators for Machines in Heading 8501 or 8502 | $2.5M | 13.75% | 83.80% | $347K |
| 8503007500 | Electric Motor Parts for Motors Under 18.65, NESOI | $2.4M | 17.03% | 76.86% | $406K |
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 · July 2026
origin
Germany and Japan together supply 41% of it.
customs district
destination
entry
rate provision · imports
11.5% enters free of duty; the effective duty rate is 20.73%.