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Subheading 4 of 9 in heading 8430
Subheading 843039 · $11.7M of $163.7M
U.S. imports of coal or rock cutters and tunneling machinery (non-self-propelled) (HS 843039) totaled $11.7M in July 2026, traded with 19 countries.
Importers of Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled) paid $1.1M in duties in July 2026 — an effective duty rate of 10% on $10.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled) imports of $11.7M in July 2026 ran 55% below the year-to-date monthly average of $25.9M.
Last updated: July 2026 dataNon-self-propelled variants of coal cutters, rock-breaking machines, and tunneling equipment — including stationary or skid-mounted units that require external traction — are split in the US schedule between rock-breaking machines (8430390040) and coal cutters and tunneling machinery (8430390080). Germany again leads US imports, underscoring the concentration of advanced underground-excavation technology among European manufacturers; South Korea and Finland round out the top three sources. The non-self-propelled distinction is commercially significant because these units are often designed as modular components within larger tunnel-drive or longwall-mining systems.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
170 shipments/mo
The self-propelled designation requires that the machine's own power unit drives its movement through the work environment. A unit that cuts or breaks rock but relies on an external vehicle, rail system, or hydraulic thrust frame for propulsion is non-self-propelled and belongs under 843039. For hybrid systems where propulsion is partially integrated, the importer should document the machine's design specifications and, if uncertain, seek a CBP binding ruling.
Importing a single machine in multiple shipments can trigger CBP's 'entireties' doctrine, under which the complete machine is classified as a whole even if components arrive separately. This can affect both the applicable tariff line and the dutiable value. Importers should disclose the multi-shipment nature of the importation and consider filing a single entry or seeking advance guidance from CBP to avoid post-entry reclassification.
HSChapter 84
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8430390040 | Rock Breaking Machines, Except Self-Propelled | $8.0M | 9.62% | 94.59% | $766K |
| 8430390080 | Coal Cutters and Tunneling Mach, Exc Self-Propelle | $3.8M | 7.66% | 75.29% | $288K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8430390000 | Coal or Rock Cutters & Tunnel Mach, NESOI | $1.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$11.7MYoY · Pro
Exports
$1.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Korea, South and Germany together supply 58% of it.
customs district
destination
entry
rate provision · imports
10.3% enters free of duty; the effective duty rate is 8.99%.