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SITCSection 7
U.S. imports of numerically controlled milling machines for metal (not elsewhere specified) (SITC 73153) totaled $20.3M in April 2026, traded with 17 countries.
Importers of Numerically Controlled Milling Machines for Metal (Not Elsewhere Specified) paid $1.1M in duties in April 2026 — an effective duty rate of 6.8% on $16.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Numerically Controlled Milling Machines for Metal (Not Elsewhere Specified) imports of $20.3M in April 2026 ran 57% above the year-to-date monthly average of $12.9M.
Last updated: April 2026 dataBed-type, planer-type, and other CNC milling configurations that are not knee-type and not classifiable as machining centers fall into SITC 73153 — a heading that captures a wide range of high-production milling platforms used in aerospace structural machining, die and mold production, and large-part manufacturing. The residual scope of this heading makes it essential to confirm that the machine lacks the automatic tool-change capability that would push it into the machining center category, and that it is not a knee-type unit covered by 73151. Section 301 tariff measures have affected imports of CNC machine tools from certain origins, making origin verification a key step in landed-cost analysis.
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The presence of an automatic tool changer (ATC) is the primary indicator of a machining center. A CNC milling machine without an ATC — even if it has a large table, multiple axes, and high-speed spindle — generally remains in the milling machine heading 73153. If the machine has an ATC and is designed for multi-operation flexible machining, it belongs in the machining center heading. Manufacturer specifications and the machine's operational design intent are the key classification evidence.
Gantry and planer-type configurations with ATC capability are frequently contested at classification. The importer should obtain detailed technical specifications — particularly regarding tool-change system design, number of controlled axes, and the manufacturer's own product categorization — and consider requesting a CBP binding ruling before importation. A licensed customs broker with machine-tool experience can help assess the classification risk and prepare the ruling request.
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Monthly import values over time