# United States tariff lines under HS 8430.31

> The United States tariff splits HS 8430.31 (coal or rock cutters and tunnelling machinery: Self-propelled) into 2 national lines: 8430.31.00.40 (rock breaking machines) and 8430.31.00.80 (other). Every United States line under 8430.31 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/843031
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) / [8430.31](https://border.bot/countries/united-states/hs-codes/843031)

## Key facts

- HS subheading: [8430.31](https://border.bot/hs-codes/843031)
- Duty (MFN): Free
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

## United States lines under 8430.31

The United States tariff splits HS 8430.31 (coal or rock cutters and tunnelling machinery: Self-propelled) into 2 national lines: 8430.31.00.40 (rock breaking machines) and 8430.31.00.80 (other).

Every United States line under 8430.31 is free of general (MFN) duty.

- [8430.31.00.40](https://border.bot/countries/united-states/hs-codes/8430310040) Coal or rock cutters and tunneling machinery, Self-propelled, Rock breaking machines. Duty (MFN): free
- [8430.31.00.80](https://border.bot/countries/united-states/hs-codes/8430310080) Coal or rock cutters and tunneling machinery, Self-propelled, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 8430.31 yet.

- [The Harmonized System text for 8430.31](https://border.bot/hs-codes/843031)

- Previous subheading: [8430.20](https://border.bot/countries/united-states/hs-codes/843020) Other moving, grading, leveling, scraping, excavating, tamping, compacting, extracting or boring machinery, for earth, minerals or ores; pile-drivers and pile-extractors; snowplows and snowblowers
- Next subheading: [8430.39](https://border.bot/countries/united-states/hs-codes/843039) Other moving, grading, leveling, scraping, excavating, tamping, compacting, extracting or boring machinery, for earth, minerals or ores; pile-drivers and pile-extractors; snowplows and snowblowers

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8430.31?

The United States tariff splits HS 8430.31 (coal or rock cutters and tunnelling machinery: Self-propelled) into 2 national lines: 8430.31.00.40 (rock breaking machines) and 8430.31.00.80 (other).

### What is the duty on HS 8430.31 in the United States?

Every United States line under 8430.31 is free of general (MFN) duty.

## 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/843031.json