U.S. imports of Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled) (HS 843039) totaled $8.2M in August 2026, imported from 19 countries.
Importers of Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled) paid $1.0M in duties in August 2026, an average duty rate of 12.34% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled) imports of $8.2M in August 2026 ran 65% below the year-to-date monthly average of $23.7M.
Last updated: August 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.
182 import shipments a month
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.
Subheading 7 of 9 in heading 8430
Subheading 843039 · $8.2M of $192.0M
ImportsExports
Imports
$8.2MYoY · free account
Exports
$2.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $217.1M of Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled) and exported $22.0M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 843039 — Coal or Rock Cutters and Tunneling Machinery (Non-Self-Propelled), so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8430390040 | Rock Breaking Machines, Except Self-Propelled | $8.0M | 12.42% | 98.10% | $992K |
| 8430390080 | Coal Cutters and Tunneling Mach, Exc Self-Propelle | $250K | 9.87% | 83.02% | $25K |
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 | $2.5M |
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.
Imports · August 2026
origin
South Korea and Finland together supply 62% of it.
customs district
destination
entry
rate provision · imports
2.4% enters free of duty; duty collected equals 12.34% of imports for consumption.