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U.S. imports of other numerically controlled grinding machines (non-flat-surface), metal removing (HS 846024) totaled $3.0M in July 2026, traded with 9 countries.
Importers of Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing paid $344K in duties in July 2026 — an effective duty rate of 11% on $3.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing imports of $3.0M in July 2026 ran 40% below the year-to-date monthly average of $5.1M.
Last updated: July 2026 dataGermany and Japan lead US imports of numerically controlled grinding machines that fall outside the flat-surface, centerless, and standard cylindrical categories — a residual but commercially significant group that includes profile grinders, thread grinders, and specialized contour-grinding equipment. The US schedule provides six 10-digit lines distinguishing used machines (8460240005, 8460240040), new external cylindrical including universal types (8460240010), new internal cylindrical (8460240030), new machines with 0.01 mm accuracy (8460240050), and other new machines (8460240080). Because this heading functions as a catch-all for NC metal-removing grinders not elsewhere classified, precise technical documentation is essential to avoid misclassification into a more specific heading.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
5 shipments/mo
Thread grinders are not flat-surface, centerless, or standard cylindrical grinders, so they fall into the 'other' NC grinding machine heading 846024 as machines not elsewhere specified. The importer should confirm the machine does not meet the description of any more specific subheading before defaulting to this residual category, and should retain manufacturer documentation describing the grinding geometry.
The 0.01 mm axis accuracy threshold is a classification criterion built into the HTS to distinguish high-precision grinding machines from general-purpose equipment. Importers must be able to substantiate the machine's rated accuracy — typically through manufacturer specifications or calibration certificates — to correctly assign the machine to 8460240050 rather than the broader NESOI line 8460240080.
Subheading 5 of 10 in heading 8460
Subheading 846024 · $3.0M of $50.5M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8460240080 | Oth Grinding Machines, Num Control, New, NESOI | $2.2M | 14.40% | 100.00% | $323K |
| 8460240005 | Grind Mac Ex Flat Surf,Mtl Remov,N/C,Used | $806K | 2.63% | 100.00% | $21K |
| 8460240010 | Grind Mac,N/C,Mtl Rmv, Extrnl Cyln Inc Uni,New,Nes | $0 | -- | -- | -- |
| 8460240030 | Grind Mac Ex Flat Surf,Mtl Remov,Intl Cyln,N/C,New | $0 | -- | -- | -- |
| 8460240050 | Grind Mac Ex Flat Surf,Mtl Remov,AC 0.01mm,N/C,New | $0 | -- | -- | -- |
HSChapter 84
ImportsExports
Imports
$3.0MYoY · Pro
Exports
$0YoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Switzerland and Germany together supply 92% of it.
customs district
destination
entry
rate provision · imports
the effective duty rate is 11.29%.