# HS code 9031.10: Machines for balancing mechanical parts

> HS code 9031.10 covers machines for balancing mechanical parts. It sits in heading 90.31 (measuring or checking instruments, appliances and machines, not specified or included elsewhere in this Chapter; profile projectors) in chapter 90 (optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof). Other goods of heading 90.31 are classified under 9031.20 (test benches), 9031.41 (other optical instruments and appliances, for inspecting semiconductor wafers or devices (including integrated circuits) or for inspecting photomasks or reticles used in manufacturing semiconductor devices (including integrated circuits)), 9031.49 (other optical instruments and appliances, other), 9031.80 (other instruments, appliances or machines) and 1 other.

Source: https://staging.border.bot/hs-codes/903110
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 90](https://staging.border.bot/hs-codes/90) / [90.31](https://staging.border.bot/hs-codes/9031) / [9031.10](https://staging.border.bot/hs-codes/903110)

## Key facts

- HS code: 9031.10
- Covers: Machines for balancing mechanical parts
- Heading: [90.31: Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this Chapter; profile projectors](https://staging.border.bot/hs-codes/9031)
- Chapter: [90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof](https://staging.border.bot/hs-codes/90)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## What this code covers

HS code 9031.10 covers machines for balancing mechanical parts.

The legal text of the subheading is “Machines for balancing mechanical parts”, in HS2022.

## What it doesn’t cover

Other goods of heading 90.31 are classified under 9031.20 (test benches), 9031.41 (other optical instruments and appliances, for inspecting semiconductor wafers or devices (including integrated circuits) or for inspecting photomasks or reticles used in manufacturing semiconductor devices (including integrated circuits)), 9031.49 (other optical instruments and appliances, other), 9031.80 (other instruments, appliances or machines) and 1 other.

- [9031.20](https://staging.border.bot/hs-codes/903120) Test benches
- [9031.41](https://staging.border.bot/hs-codes/903141) Other optical instruments and appliances: For inspecting semiconductor wafers or devices (including integrated circuits) or for inspecting photomasks or reticles used in manufacturing semiconductor devices (including integrated circuits)
- [9031.49](https://staging.border.bot/hs-codes/903149) Other optical instruments and appliances: Other
- [9031.80](https://staging.border.bot/hs-codes/903180) Other instruments, appliances and machines
- [9031.90](https://staging.border.bot/hs-codes/903190) Parts and accessories

## How it is structured

9031.10 is a six-digit subheading. Its first two digits, 90, are the chapter; the first four, 9031, are heading 90.31; the last two, 10, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 90: Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof
- Heading 90.31: Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this Chapter; profile projectors
- Subheading 9031.10: Machines for balancing mechanical parts

## In other countries

No national tariff lines under 9031.10 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 9031.10 at six digits and add their own digits after it.

- Previous subheading: [9030.90](https://staging.border.bot/hs-codes/903090) Parts and accessories
- Next subheading: [9031.20](https://staging.border.bot/hs-codes/903120) Test benches

## Frequently asked questions

### What does HS code 9031.10 cover?

HS code 9031.10 covers machines for balancing mechanical parts.

### Which heading and chapter is HS code 9031.10 in?

HS code 9031.10 is in heading 90.31 (measuring or checking instruments, appliances and machines, not specified or included elsewhere in this Chapter; profile projectors) in chapter 90 (optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof).

### Where are goods of heading 90.31 classified when 9031.10 doesn’t fit?

Other goods of heading 90.31 are classified under 9031.20 (test benches), 9031.41 (other optical instruments and appliances, for inspecting semiconductor wafers or devices (including integrated circuits) or for inspecting photomasks or reticles used in manufacturing semiconductor devices (including integrated circuits)), 9031.49 (other optical instruments and appliances, other), 9031.80 (other instruments, appliances or machines) and 1 other.

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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.

Machine-readable: https://staging.border.bot/hs-codes/903110.json