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SITCSection 7
U.S. imports of self-propelled boring & sinking machinery (nes) (SITC 72337) totaled $51.1M in April 2026, traded with 17 countries.
Importers of Self-Propelled Boring & Sinking Machinery (NES) paid $3.5M in duties in April 2026 — an effective duty rate of 7.7% on $45.6M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataBoring and sinking machinery not elsewhere specified — including water-well drilling rigs, blast-hole drills, and shaft-sinking equipment mounted on self-propelled carriers — falls under this residual heading when no more specific SITC category applies. The 'NES' qualifier means classification here is appropriate only after confirming the equipment does not belong to a more specific heading such as coal or rock cutters (72335). Drill rig configurations vary widely by rotary versus percussion drive, mast height, and carrier type, all of which can affect HTS subheading assignment.
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The NES (not elsewhere specified) qualifier requires a process of elimination. If the rig is designed primarily for coal or rock cutting and tunneling, it belongs under 72335. If it is a geotechnical or water-well drill mounted on a self-propelled chassis with no more specific classification, 72337 applies. Consulting the SITC explanatory notes and the corresponding HTS chapter notes — and, when in doubt, obtaining a CBP binding ruling — is the recommended approach.
At the SITC level, carrier type does not change the heading, but it can matter at the HTS 10-digit level where subheadings sometimes distinguish wheeled from crawler-mounted units. Importers should include the carrier configuration in their classification analysis and verify with a licensed customs broker.
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Monthly import values over time