Harmonized System
U.S. imports of Numerically Controlled Boring-Milling Machines for Metal Removal (HS 845931) totaled $7.9M in August 2026, imported from 11 countries.
Importers of Numerically Controlled Boring-Milling Machines for Metal Removal paid $734K in duties in August 2026, an average duty rate of 10.04% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Numerically Controlled Boring-Milling Machines for Metal Removal imports of $7.9M in August 2026 ran 21% below the year-to-date monthly average of $10.0M.
Last updated: August 2026 dataNumerically controlled boring-milling machines occupy a premium tier of the metalworking equipment market, serving aerospace, energy, and heavy-equipment manufacturers that require simultaneous boring and milling in a single setup. Italy and Switzerland lead US supply under this heading, reflecting the European precision-machine-tool industry's dominance in high-tolerance horizontal spindle equipment. The US schedule distinguishes horizontal-spindle table-type machines (8459310010), other horizontal-spindle configurations (8459310040), non-horizontal-spindle new machines (8459310070), and used or rebuilt units (8459310005). Buyers should verify spindle orientation and table configuration carefully, as misclassification between these lines is a common audit finding.
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20 import shipments a month
Table-type machines feature a workpiece table that moves in multiple axes relative to a fixed or traversing spindle head, enabling precise positioning of large workpieces. Non-table-type horizontal-spindle machines use different workpiece-holding or column arrangements. The distinction directly determines which 10-digit HTS line applies — 8459310010 for table-type versus 8459310040 for other horizontal-spindle configurations — so machine specifications and manufacturer documentation are essential at entry.
Both countries host long-established precision machine-tool clusters — Italy's Lombardy and Piedmont regions and Switzerland's industrial corridor — that specialize in large-format, high-tolerance boring-milling centers. Their machines are widely specified by aerospace and heavy-industry buyers who prioritize accuracy and after-sales support over unit price, sustaining strong import volumes despite premium pricing.
Subheading 2 of 12 in heading 8459
Subheading 845931 · $7.9M of $37.2M
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 |
|---|---|---|---|---|---|
| 8459310070 | Bor-Mil Mac, Exc Horiz Spin, Mtl Remov, N/C, New, NESOI | $6.7M | 10.05% | 100.00% | $673K |
| 8459310040 | Bor-Mil Mac, Horiz Spn, Ex Tbl Typ, Mtl Remov, N/C, New | $450K | 10.00% | 100.00% | $45K |
| 8459310010 | Bor-Mil Mac, Horiz Spin, Table Typ, Mtl Remov, N/C, New | $158K | 10.00% | 100.00% | $16K |
| 8459310005 | Comb Boring-Milling Mach, Metal Remov, N/C, Used | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8459310070 | Bor-Mil Mac, Exc Horiz Spin, Mtl Remov, N/C, New, NESOI | $2.0M |
| 8459310005 | Comb Boring-Milling Mach, Metal Remov, N/C, Used | $66K |
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.
Trade Directory
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ImportsExports
Imports
$7.9MYoY · free account
Exports
$2.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $112.8M of Numerically Controlled Boring-Milling Machines for Metal Removal and exported $18.5M.
Through August 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
Italy and Germany together supply 68% of it.
customs district
destination
entry
rate provision · imports
duty collected equals 10.04% of imports for consumption.