Harmonized System
U.S. imports of Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing (HS 846024) totaled $780K in August 2026, imported from 9 countries.
Importers of Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing paid $94K in duties in August 2026, an average duty rate of 12.03% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing imports of $780K in August 2026 ran 83% below the year-to-date monthly average of $4.5M.
Last updated: August 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.
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3 import shipments a month
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 9 of 10 in heading 8460
Subheading 846024 · $780K of $104.9M
Trade Directory
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ImportsExports
Imports
$780KYoY · free account
Exports
$500KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $47.5M of Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing and exported $12.6M.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 8460240080 | Oth Grinding Machines, Num Control, New, NESOI | $780K | 12.03% | 100.00% | $94K |
| 8460240005 | Grind Mac Ex Flat Surf, Mtl Remov, N/C, Used | — | -- | -- | -- |
| 8460240010 | Grind Mac, N/C, Mtl Rmv, Extrnl Cyln Inc Uni, New, Nes | — | -- | -- | -- |
| 8460240030 | Grind Mac Ex Flat Surf, Mtl Remov, Intl Cyln, N/C, New | — | -- | -- | -- |
| 8460240050 | Grind Mac Ex Flat Surf, Mtl Remov, AC 0.01mm, N/C, New | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460240080 | Grind Mac Ex Flat Surf, Mtl Remov, N/C, New, NESOI | $450K |
| 8460240040 | Grind Mac Ex Flat Surf, Mtl Remov, N/C, Used | $50K |
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.
Imports · August 2026
origin
Japan and Germany together supply 100% of it.
customs district
destination
entry
rate provision · imports
duty collected equals 12.03% of imports for consumption.