Product classification

HS code for Stone machine parts: 8466.91

Parts & accessories suited for use solely/principally, for the machines of heading no. 8464, n.e.c. in heading no. 8466.

Classification of stone machine parts under HS 8466.91

HS code 846691 is designated for parts and accessories that are used solely or principally with the machine-tools of heading 8464. This classification follows the logic of Section XVI, Note 2(b), which states that parts suitable for use solely or principally with a particular kind of machine are to be classified with those machines or in the appropriate parts heading. Since heading 8464 covers stone-working machine tools, their specific components fall under 8466. This includes a wide range of mechanical elements that do not have a more specific heading elsewhere in the nomenclature. It is important to note that this code does not include interchangeable tools. For example, a diamond-tipped drill bit or a saw blade would be classified in Chapter 82 or 68, depending on its composition, even if it is used on a stone-working machine. Heading 8466 is reserved for the structural or functional components of the machine itself, such as specialized carriages, tool holders, or protective housings. Accurate classification requires identifying whether the part is a general-purpose component (like a standard ball bearing, which might go to 8482) or a part unique to the stone-working apparatus. The distinction is vital for importers to avoid duty rate errors and ensure compliance with customs regulations regarding machinery components.

Covers
  • Tool holders for stone CNC machines
  • Work holders and clamps for stone saws
  • Dividing heads for stone carving machines
  • Specialized machine beds for stone grinders
  • Protective housings for stone-working machine tools
Also under 8466.91
  • Husqvarna K-series parts
  • Tyrolit grinding machine accessories
  • Makita stone cutter parts
  • Bosch diamond tool accessories
  • Montresor glass processing machine parts

Codes often confused with 8466.91

Common mistake. Parts for stone machinery are often misclassified under 847490, which is for parts of mineral processing machinery. If the part belongs to a machine-tool (like a bridge saw), it must go to 846691. Additionally, interchangeable tools like diamond blades are often wrongly placed here instead of 6804 or 8202.

8474.90Machines, for sorting, screening, separating, washing, crushing etc mineral substances, for agglomerating, shaping or moulding solid fuels, ceramic pastes etc, for forming foundry moulds of sand; parts68.04Millstones, grindstones, grinding wheels, etc without frameworks, for grinding, sharpening, polishing, etc and parts thereof, natural stone, agglomerated natural or artificial abrasives or of ceramics82.02Tools, hand; saws and blades for saws of all kinds (including slitting, slotting or toothless saw blades)

Top exporters and importers of HS 846691 (the code used for stone machine parts), 2025

In 2025, the largest exporter of HS 846691 (the code used for stone machine parts) in UN Comtrade data was the United States, with 31% of world exports; the largest importer in UN Comtrade data was Taiwan, with about 12% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Figures cover everything classified under HS 846691, not only stone machine parts.

Top exporters 2025 · share of world exports

  1. 1 United States $263M
  2. 2 Italy $128M
  3. 3 China $96M

World total: $861M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Taiwan* ~$88M
  2. 2 United States $78M
  3. 3 Germany $52M

World total: $729M Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM code for stone machine parts

Brazil classifies stone machine parts under NCM 8466.91.00: HS 8466.91 with 00 added.

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about stone machine parts

What is the HS code for Stone machine parts?

The HS code for Stone machine parts is 846691 (Parts & accessories suited for use solely/principally; for the machines of heading no. 8464, n.e.c. in heading no. 8466). The HS code for parts and accessories of stone-working machine tools is 846691.

How do I classify Stone machine parts for customs?

Stone machine parts is classified under HS code 846691 — Parts & accessories suited for use solely/principally; for the machines of heading no. 8464, n.e.c. in heading no. 8466. This is a 6-digit subheading level code.

Are diamond saw blades classified as parts under 846691?

No, diamond saw blades are considered interchangeable tools and are typically classified under HS code 680421 or 820239, depending on their construction.

Which countries are the top exporters of stone machine parts (HS 846691)?

In 2025, the top exporters of HS 846691 (the code used for stone machine parts) in UN Comtrade data were the United States ($263M, 31% of world exports), Italy ($128M) and China ($96M). World exports came to about $861M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of stone machine parts (HS 846691)?

In 2025, the top importers of HS 846691 (the code used for stone machine parts) in UN Comtrade data were Taiwan (about $88M, 12% of world imports), the United States ($78M) and Germany ($52M). World imports came to about $729M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Is the HS code for Stone machine parts the same in all countries?

The base HS code 846691 for Stone machine parts is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.

What is the NCM code for stone machine parts in Brazil?

In Brazil, stone machine parts (HS 846691) is classified under NCM 8466.91.00.