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SITCSection 7
U.S. imports of unit construction machines (single station) for working metal (SITC 73122) totaled $2.1M in April 2026, traded with 5 countries.
Importers of Unit Construction Machines (Single Station) for Working Metal paid $277K in duties in April 2026 — an effective duty rate of 14% on $2.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Unit Construction Machines (Single Station) for Working Metal imports of $2.1M in April 2026 ran 122% above the year-to-date monthly average of $942K.
Last updated: April 2026 dataSingle-station unit construction machines are purpose-built, fixed-cycle metalworking systems designed to perform one or a limited set of operations at a dedicated workstation, contrasting with the multi-operation flexibility of machining centers. They are commonly integrated into high-volume transfer lines in automotive powertrain and appliance manufacturing, where cycle-time consistency outweighs operational flexibility. Classification requires distinguishing single-station units from multistation transfer machines, as the two headings reflect fundamentally different production architectures.
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A unit construction machine is designed for fixed, repetitive operations at one station and typically lacks the automatic tool-changing and multi-operation flexibility that define a machining center. The distinction matters for correct SITC and HTS classification; importers should provide manufacturer specifications detailing the machine's operational architecture to CBP.
These machines are most prevalent in high-volume, fixed-cycle manufacturing environments such as automotive engine and transmission component production, where consistent cycle times and dedicated tooling setups are prioritized over operational flexibility.
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Monthly import values over time