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SITCSection 7
U.S. imports of numerically controlled grinding machines (nes, ≥0.01 mm accuracy) (SITC 73163) totaled $25.2M in April 2026, traded with 17 countries.
Importers of Numerically Controlled Grinding Machines (NES, ≥0.01 mm Accuracy) paid $3.6M in duties in April 2026 — an effective duty rate of 12% on $28.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCNC grinding machines classified here combine programmable multi-axis control with a positioning accuracy of at least 0.01 mm, placing them among the higher-precision segments of the metalworking machine tool trade. The NES qualifier means these are grinding machines not captured by more specific headings — such as flat-surface or cylindrical grinders — making the classification a residual catch-all for specialized geometries including profile, gear, and thread grinders. Section 301 tariff exposure is a live concern for machines sourced from China, and importers should confirm current product coverage before contracting.
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Profile grinders, gear grinders, thread grinders, and other specialized geometries that do not fit the flat-surface or cylindrical grinder headings are the most common candidates. If a machine's grinding action is defined by a complex programmed path rather than a simple planar or cylindrical motion, it is more likely to land in this residual NES category.
Yes. Origin is critical: machines manufactured in China may carry Section 301 tariff liability in addition to the standard MFN duty. Machines from countries with US free-trade agreements may receive preferential treatment, but origin must be substantiated with appropriate documentation such as a certificate of origin or manufacturer's declaration.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $5.2M | $160K | -$5.0M |
| SWITZERLAND | $5.3M | -- | -$5.3M |
| SPAIN | $4.4M | -- | -$4.4M |
| JAPAN | $3.2M | $66K | -$3.1M |
| CZECH REPUBLIC | $3.0M | -- | -$3.0M |
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Monthly import values over time