# United States tariff lines under HS 8483.40

> The United States tariff splits HS 8483.40 (gears and gearing, other than toothed wheels, chain sprockets and other transmission elements presented separately; ball or roller screws; gear boxes and other speed changers, including torque converters) into 9 national lines: 8483.40.10.00 (torque converters), 8483.40.30.40 (fixed ratio speed changers), 8483.40.30.80 (other), 8483.40.50.10 (fixed ratio speed changers) and 5 others.

Source: https://border.bot/countries/united-states/hs-codes/848340
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)

## Key facts

- HS subheading: [8483.40](https://border.bot/hs-codes/848340)
- National lines: 9
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

## United States lines under 8483.40

The United States tariff splits HS 8483.40 (gears and gearing, other than toothed wheels, chain sprockets and other transmission elements presented separately; ball or roller screws; gear boxes and other speed changers, including torque converters) into 9 national lines: 8483.40.10.00 (torque converters), 8483.40.30.40 (fixed ratio speed changers), 8483.40.30.80 (other), 8483.40.50.10 (fixed ratio speed changers) and 5 others.

- [8483.40.10.00](https://border.bot/countries/united-states/hs-codes/8483401000) 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, Torque converters. Duty (MFN): free
- [8483.40.30.40](https://border.bot/countries/united-states/hs-codes/8483403040) 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
- [8483.40.30.80](https://border.bot/countries/united-states/hs-codes/8483403080) 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, Other. Duty (MFN): free
- [8483.40.50.10](https://border.bot/countries/united-states/hs-codes/8483405010) 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, Fixed ratio speed changers. Duty (MFN): 2.5%
- [8483.40.50.20](https://border.bot/countries/united-states/hs-codes/8483405020) 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, Gear boxes and speed changers for wind turbines, as described in statistical note 9 to this chapter. Duty (MFN): 2.5%
- [8483.40.50.80](https://border.bot/countries/united-states/hs-codes/8483405080) 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, Other. Duty (MFN): 2.5%
- [8483.40.70.00](https://border.bot/countries/united-states/hs-codes/8483407000) 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, Other speed changers. Duty (MFN): 25¢ each + 3.9%
- [8483.40.80.00](https://border.bot/countries/united-states/hs-codes/8483408000) 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, Ball or roller screws. Duty (MFN): 3.8%
- [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; ball or roller screws; gear boxes and other speed changers, including torque converters, Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately. Duty (MFN): 2.5%

## 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)

- Previous subheading: [8483.30](https://border.bot/countries/united-states/hs-codes/848330) Bearing housings; plain shaft bearings
- Next subheading: [8483.50](https://border.bot/countries/united-states/hs-codes/848350) Flywheels and pulleys, including pulley blocks

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8483.40?

The United States tariff splits HS 8483.40 (gears and gearing, other than toothed wheels, chain sprockets and other transmission elements presented separately; ball or roller screws; gear boxes and other speed changers, including torque converters) into 9 national lines: 8483.40.10.00 (torque converters), 8483.40.30.40 (fixed ratio speed changers), 8483.40.30.80 (other), 8483.40.50.10 (fixed ratio speed changers) and 5 others.

## 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/848340.json