# United States tariff line 8483.40.30.40: Fixed ratio speed changers > In the United States tariff, line 8483.40.30.40 covers 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, imported for use with machines for making cellulosic pulp, paper or paperboard, fixed ratio speed changers. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8483.40 in heading 84.83 (chapter 84). Source: https://border.bot/countries/united-states/hs-codes/8483403040 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8483.40](https://border.bot/countries/united-states/hs-codes/848340) / [8483.40.30.40](https://border.bot/countries/united-states/hs-codes/8483403040) ## Key facts - Tariff line: 8483.40.30.40 - Covers: 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, imported for use with machines for making cellulosic pulp, paper or paperboard, fixed ratio speed changers - Duty (MFN): Free - Additional duties: None recorded - Restrictions: None recorded - Tariff: [United States](https://border.bot/countries/united-states) - HS subheading: [8483.40](https://border.bot/hs-codes/848340) ## What this line covers In the United States tariff, line 8483.40.30.40 covers 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, imported for use with machines for making cellulosic pulp, paper or paperboard, fixed ratio speed changers. Its legal text is “Fixed ratio speed changers”, read under “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” and “Imported for use with machines for making cellulosic pulp, paper or paperboard”. ## How it is structured It falls under HS subheading 8483.40 in heading 84.83 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff. - Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof - Heading 84.83: 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 - Subheading 8483.40: 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 - Within the subheading: Gear boxes and other speed changers - Within the subheading: Fixed ratio speed changers, multiple and variable ratio speed changers each ratio of which is selected by manual manipulation - Within the subheading: Imported for use with machines for making cellulosic pulp, paper or paperboard - Line 8483.40.30.40: Fixed ratio speed changers ## Duty Goods under this line enter free of general (MFN) duty. The rate is published on 8483.40.30. ## In other countries No other national tariff on border.bot has live lines under 8483.40 yet. - [The Harmonized System text for 8483.40](https://border.bot/hs-codes/848340) ## Other lines under 8483.40 - [8483.40.10.00](https://border.bot/countries/united-states/hs-codes/8483401000) Torque converters - [8483.40.30.80](https://border.bot/countries/united-states/hs-codes/8483403080) Other - [8483.40.50.10](https://border.bot/countries/united-states/hs-codes/8483405010) Fixed ratio speed changers - [8483.40.50.20](https://border.bot/countries/united-states/hs-codes/8483405020) Gear boxes and speed changers for wind turbines, as described in statistical note 9 to this chapter - [8483.40.50.80](https://border.bot/countries/united-states/hs-codes/8483405080) Other - [8483.40.70.00](https://border.bot/countries/united-states/hs-codes/8483407000) Other speed changers - [8483.40.80.00](https://border.bot/countries/united-states/hs-codes/8483408000) Ball or roller screws - [8483.40.90.00](https://border.bot/countries/united-states/hs-codes/8483409000) Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately - Previous line: [8483.40.10.00](https://border.bot/countries/united-states/hs-codes/8483401000) Torque converters - Next line: [8483.40.30.80](https://border.bot/countries/united-states/hs-codes/8483403080) Other ## Frequently asked questions ### What does tariff line 8483.40.30.40 cover in the United States tariff? In the United States tariff, line 8483.40.30.40 covers 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, imported for use with machines for making cellulosic pulp, paper or paperboard, fixed ratio speed changers. ### What is the general (MFN) duty on 8483.40.30.40 in the United States? Goods under this line enter free of general (MFN) duty. The rate is published on 8483.40.30. ## Sources and updates The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. This page was last updated on 9 October 2026. Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling. Official source files: - https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false Machine-readable: https://border.bot/countries/united-states/hs-codes/8483403040.json