HTS 8483.40.50Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof:Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately; ball or roller screws; gear boxes and other speed changers, including torque converters: Gear boxes and other speed changers: Fixed ratio speed changers, multiple and variable ratio speed changers each ratio of which is selected by manual manipulation: Other

What that translates to:Other fixed or manually shifted gearboxes and speed changers

Also written 84834050. Rates as CBP is collecting them today. Updated Oct 1, 2026.

Country of origin

Other fixed or manually shifted gearboxes and speed changers (HTS 8483.40.50) from China, as of Oct 1, 2026: the tariffs below apply to different 10-digit statistical lines of this code, so the total depends on which line your goods are entered under; each layer names its lines.

Total duty rateDepends on the 10-digit line

Steel, aluminum and copper tariffSection 232, since Apr 6, 2026Applies only to line 8483.40.502025%

Forced-labor tariffSection 301, since Jul 24, 2026Doesn't apply to line 8483.40.502012.5%

China tariffSection 301, since May 10, 201925%

Regular dutyBase rate (MFN) in the tariff schedule2.5%

Total dutyDepends on the 10-digit line

The forced-labor tariff may not apply. The legal text: “articles that are civil aircraft (all aircraft other than military aircraft); their engines, parts and components; their other parts, components and subassemblies; and ground flight simulators and their parts and components, that otherwise meet the criteria of general note 6 of the HTSUS” (HTS 9903.05.88).

The steel, aluminum and copper tariff doesn't apply to “Articles provided for in subdivision (c) of U.S. note 16 to this subchapter that do not contain any aluminum, steel, or copper” (HTS 9903.82.01).

The steel, aluminum and copper tariff doesn't apply to “Except for articles classifiable in chapters 72, 73, 74 or 76, articles where the weight of the applicable metal is less than 15 percent of the weight of the imported article” (HTS 9903.82.03).

The steel, aluminum and copper tariff may not apply. The legal text: “articles that otherwise meet the criteria of subdivisions (c)(vi)–(viii) and (xi) that are motorcycle parts classifiable in chapter 84, 85 or 87 for use in the manufacturing of motorcycles in the United States” (HTS 9903.82.13).

No forced-labor tariff on line 8483.40.5020: the steel, aluminum and copper tariff (HTS 9903.82.09) covers it instead.

No forced-labor tariff if the steel, aluminum and copper tariff (HTS 9903.82.06) applies to your goods.

No forced-labor tariff if the steel, aluminum and copper tariff (HTS 9903.82.25) applies to your goods.

The steel, aluminum and copper tariff instead adds 10% where this applies: “For derivative articles provided for in subdivisions (c)(ii), (vi), and (ix), at least 85 percent of the aluminum content of the article must be composed of aluminum that was smelted and cast in the United States. For derivative articles provided for in subdivisions (c)(iv), (vii), (x) and (xi), at least 85 percent of the steel content of the article must be composed of steel that was melted and poured in the United States. For articles provided for in subdivision (c)(viii), at least 85 percent of the copper content of the article must be composed of copper that was smelt and cast in the United States. These requirements are cumulative such that a derivative article in more than one subdivision must satisfy each requirement” (HTS 9903.82.06). Lines 8483.40.5020.

The steel, aluminum and copper tariff instead is 15% in place of the regular duty where this applies: “parts classifiable in the provisions of subdivision (c)(vi)–(viii) of this note that are in chapters 84, 85, or 87 of the HTSUS that will be used exclusively in the manufacturing of agricultural equipment or fixed industrial equipment provided for in subdivision (c)(ix)–(x) of this note or mobile industrial equipment provided for in subdivision (c)(xi) of this note” (HTS 9903.82.25). Lines 8483.40.5020.

The steel, aluminum and copper tariff instead adds 200% where this applies: “where any amount of primary aluminum used in the manufacture of the derivative articles is smelted in Russia, or where the derivative aluminum articles are cast in Russia” (HTS 9903.85.68). Lines 8483.40.5020.

Court status: Challenged at the U.S. Court of International Trade in In re Section 301 Forced Labor Cases, Court No. 26-03555-3JP, before a three-judge panel. The plaintiffs, Learning Resources and others, have moved for judgment on the agency record, arguing that the action (91 FR 47318) exceeds USTR's statutory authority, is arbitrary and capricious, and is pretextual; 25 states, plaintiffs in Court No. 26-cv-03467-3JP, support them as amici (brief filed Sep 11, 2026). No ruling as of Oct 1, 2026, so the rate is unchanged.

Sources: USITC Harmonized Tariff Schedule, Revision 20 (2026); Proclamation 11032 of Jun 1, 2026, Further Adjusting the Tariff Regimes for Imports of Aluminum, Steel, and Copper Into the United States, 91 FR 34085, Jun 4, 2026; HTS 9903.82.09; USTR, Notice of Actions in Section 301 Investigations (forced labor), 91 FR 47318, Jul 28, 2026; HTS 9903.05.31; USTR, Notice of Modification of Section 301 Action (List 3 raised to 25% from May 10, 2019), 84 FR 20459, May 9, 2019; HTS 9903.88.03.

Estimate your duty

Special rules apply to this code or country, so we don't estimate it here. A licensed customs broker can work it out for your shipment.

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Details for customs filings

Official description

Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof: Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately; ball or roller screws; gear boxes and other speed changers, including torque converters: Gear boxes and other speed changers: Fixed ratio speed changers, multiple and variable ratio speed changers each ratio of which is selected by manual manipulation: Other

Legal text from the Harmonized Tariff Schedule, Revision 20 (2026), chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.

Statistical lines

The 10-digit numbers used on entry paperwork. They share this code's duty rates.

8483.40.5010 (8483405010)Fixed ratio speed changers · reported in No.
8483.40.5020 (8483405020)Gear boxes and speed changers for wind turbines, as described in statistical note 9 to this chapter · reported in No.
8483.40.5080 (8483405080)Other · reported in No.

What changed for this code

Questions about HTS 8483.40.50

What is the duty rate for HTS 8483.40.50?

The regular (column 1 general) rate printed in the tariff schedule is 2.5%. Additional tariffs depend on the country of origin; choose one above to see its full rate.

Is HTS 8483.40.50 subject to Section 301 tariffs?

Yes, for goods from 85 countries and territories as of Oct 1, 2026, including Algeria, Angola, Argentina, Australia, Austria. Choose a country above to see the rate and any exemptions.

Is HTS 8483.40.50 subject to Section 232 tariffs?

Yes, for goods from 238 countries and territories as of Oct 1, 2026, including Afghanistan, Åland Islands, Albania, Algeria, Andorra. Choose a country above to see the rate and any exemptions.

HTSLookup shows the duties CBP collects on this code by country of origin. Antidumping or countervailing duties may also apply to some exporters; they're set per company and aren't shown.