Toothed wheels, chain sprockets and other transmission elements presented separately; parts

US trade by year

US imports were $2.55B in the 12 months to Aug 2026, up 37% on the 12 months to Aug 2017. US exports were $1.75B, up 52%. In January 2022 the HS 2022 revision moved some goods between this code and 8549.21, 8549.29, 8549.31 and 3 more, so part of a change across the dashed line can be the revision. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

• China
• Germany
• Italy
• Mexico
• All countries

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Average prices aren't shown because this product's lines are counted in different units.

The 3 largest suppliers had 39.9% of US imports over the last 12 months.

How the market is shifting

Italy gained the most share: 12.5% of US imports over the last 12 months, up from 6.3% in the 12 months before. Korea, South lost the most: 4.9%, down from 6.8%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

• China
• Germany
• Italy
• Mexico
• All countries

Tariff actions touching this product

When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.

1. March–April 2026 · Duty paid: China 59.3% → 43.1%, Germany 34.1% → 22.1%, Mexico 21.4% → 15.0%, Japan 28.6% → 14.9%, Italy 30.9% → 20.9%, all countries 33.4% → 21.7%.
   • Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal TradeDec 18, 2025 · International Trade Administration
   • Implementing Certain Tariff-Related Elements of the U.S.-Korea Strategic Trade and Investment DealDec 4, 2025 · International Trade Administration
2. August–October 2025 · Duty paid: China 55.0% → 65.8%, Germany 11.3% → 35.1%, Mexico 11.2% → 21.2%, Japan 10.2% → 32.6%, Italy 10.0% → 33.0%, all countries 16.7% → 34.4%.
   • Implementing Certain Tariff-Related Elements of the U.S.-EU Framework on an Agreement on Reciprocal, Fair, and Balanced TradeSep 25, 2025 · Office of the US Trade Representative
   • Implementing Certain Tariff-Related Elements of the United States-Japan AgreementSep 16, 2025 · International Trade Administration
   • Adoption and Procedures of the Section 232 Steel and Aluminum Tariff Inclusions ProcessAug 19, 2025 · Bureau of Industry and Security
3. March 2025 · Duty paid: China 27.1% → 56.8%, Germany 2.6% → 9.1%, Mexico 1.0% → 9.7%, Japan 2.5% → 7.8%, Italy 2.1% → 8.1%, all countries 6.0% → 15.7%.
4. June 2019 · Duty paid: China 16.5% → 24.7%.
   • Notice of Product Exclusions: China's Acts, Policies, and Practices Related to Technology Transfer, Intellectual Property, and InnovationJun 4, 2019 · Office of the US Trade Representative
5. August 2018 · Duty paid: China 2.7% → 13.2%.
   • Request for Comments Concerning Proposed Modification of Action Pursuant to Section 301: China's Acts, Policies, and Practices Related to Technology Transfer, Intellectual Property, and InnovationJul 17, 2018 · Office of the US Trade Representative
   • Tapered Roller Bearings and Parts Thereof, Finished and Unfinished, From the People's Republic of China: Preliminary Results and Intent To Rescind the Review in Part; 2016-2017Jul 12, 2018 · International Trade Administration

Federal Register notices from the last 12 months that list this product's tariff codes. A notice can add a duty, exclude products from one or only mention them, so read each for what it changes. These are the 5 newest of 6. Search the Federal Register for 8483.90

• Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal DeforestationJul 20, 2026 · Office of the US Trade Representative
• Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal DeforestationJun 4, 2026 · Office of the US Trade Representative
• Implementing Certain Tariff-Related Elements of a Trade and Security Agreement Between the American Institute in Taiwan and the Taipei Economic and Cultural Representative Office in the United StatesMay 28, 2026 · Office of the US Trade Representative
• Tapered Roller Bearings and Parts Thereof, Finished or Unfinished From the People's Republic of China: Preliminary Results of Antidumping Duty Administrative Review; 2024-2025May 15, 2026 · International Trade Administration
• Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal TradeDec 18, 2025 · International Trade Administration

Markets abroad

Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 124 have reported 2025 so far. Where a country's figure for imports from the US is under half or over double what the US recorded exporting there that year, the US figure is shown under it.

The biggest market outside the US is Germany, which imported $2.11B of this product in 2025, 7.2% of that from the US.

The US supplies 49.8% of imports into Canada and 38.6% into Mexico, but under 10% into Germany, India and Italy.

Of these, imports into India grew fastest: up 23% from 2024 to 2025.

Related products

Other products under heading 8483: transmission shafts and cranks; bearing housings, housed bearings etc.; gears and gearing; ball & roller screws; clutches, etc.; and parts. US trade over the 12 months to August 2026.