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HSChapter 84
U.S. imports of other numerically controlled grinding machines (non-flat-surface), metal removing (HS 846024) totaled $7.3M in April 2026, traded with 7 countries.
Importers of Other Numerically Controlled Grinding Machines (Non-Flat-Surface), Metal Removing paid $1.1M in duties in April 2026 — an effective duty rate of 9.0% on $11.9M 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 $7.3M in April 2026 ran 24% above the year-to-date monthly average of $5.9M.
Last updated: April 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.
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.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CZECH REPUBLIC | $3.0M | -- | -$3.0M |
| JAPAN | $2.2M | -- | -$2.2M |
| GERMANY | $1.5M | -- | -$1.5M |
| CANADA | -- | $1.0M | +$1.0M |
| FRANCE | $625K | -- | -$625K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8460240080 | OTH GRINDING MACHINES, NUM CONTROL, NEW, NESOI | $7.3M | 9.03% | $1.1M |
| 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 | -- | -- |
OTH GRINDING MACHINES, NUM CONTROL, NEW, NESOI
GRIND MAC,N/C,MTL RMV, EXTRNL CYLN INC UNI,NEW,NES
GRIND MAC EX FLAT SURF,MTL REMOV,INTL CYLN,N/C,NEW
GRIND MAC EX FLAT SURF,MTL REMOV,AC 0.01MM,N/C,NEW
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460240080 | GRIND MAC EX FLAT SURF,MTL REMOV,N/C,NEW,NESOI | $1.0M |
| 8460240040 | GRIND MAC EX FLAT SURF,MTL REMOV,N/C,USED | $0 |
GRIND MAC EX FLAT SURF,MTL REMOV,N/C,NEW,NESOI
2 no
GRIND MAC EX FLAT SURF,MTL REMOV,N/C,USED
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Maryland | $3.0M | -- | -$3.0M |
| California | $2.2M | -- | -$2.2M |
| Wisconsin | $1.5M | -- | -$1.5M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| BALTIMORE, MD | $3.0M | -- | -$3.0M |
| LOS ANGELES, CA | $2.2M | -- | -$2.2M |
| NEWARK, NJ | $1.5M | -- | -$1.5M |