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HSChapter 84
U.S. imports of flat-surface grinding machines, not numerically controlled (axis accuracy ≥ 0.01 mm) (HS 846019) totaled $975K in April 2026, traded with 14 countries.
Importers of Flat-Surface Grinding Machines, Not Numerically Controlled (Axis Accuracy ≥ 0.01 mm) paid $146K in duties in April 2026 — an effective duty rate of 15% on $975K in dutiable value, based on actual customs collections rather than the published tariff schedule. Flat-Surface Grinding Machines, Not Numerically Controlled (Axis Accuracy ≥ 0.01 mm) imports of $975K in April 2026 ran 35% below the year-to-date monthly average of $1.5M.
Last updated: April 2026 dataManually or conventionally controlled flat-surface grinders with axis accuracy of 0.01 mm or better occupy a distinct tariff position from their CNC counterparts — a classification boundary that trade professionals must navigate carefully when the machine has partial digital readout but no full NC control. Thailand and Taiwan are the leading US import sources for this category, supplying cost-competitive conventional surface grinders widely used in job shops and maintenance operations. The US schedule provides three 10-digit lines covering used/rebuilt machines (8460190105), new reciprocating-table machines (8460190110), and other new non-NC machines meeting the accuracy threshold (8460190150). Correct classification hinges on confirming the absence of numerical control, not merely the absence of CNC programming.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A digital readout (DRO) alone does not constitute numerical control. Numerical control requires programmed, closed-loop axis movement. A machine with only a DRO for operator reference should be classified under the non-numerically-controlled heading (846019), not 846012, provided it meets the 0.01 mm axis accuracy threshold.
The US schedule specifically breaks out new reciprocating-table flat-surface grinders (8460190110) from other non-NC flat-surface grinders (8460190150) because the table motion type is a recognized commercial and engineering distinction. Importers should confirm table configuration in technical documentation to support correct line selection.
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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 |
|---|---|---|---|---|
| 8460190150 | FLAT-SUR GRIND MA,MTL REMOV,ACC0.01MM,EX N/C,NESOI | $748K | 14.77% | $111K |
| 8460190110 | FLAT-SUR GRIND MAC,RECIP-TAB,MTL REMOV,EXC N/C,NEW | $227K | 15.49% | $35K |
| 8460190105 | FLAT-SURF GRIND MACH, NESOI, USED/REBUILT | $0 | -- | -- |
FLAT-SUR GRIND MA,MTL REMOV,ACC0.01MM,EX N/C,NESOI
FLAT-SUR GRIND MAC,RECIP-TAB,MTL REMOV,EXC N/C,NEW
FLAT-SURF GRIND MACH, NESOI, USED/REBUILT
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460190105 | FLAT-SURF GRIND MACH, NESOI, USED/REBUILT | $292K |
| 8460190110 | FLAT-SUR GRIND MAC,RECIP-TAB,MTL REMOV,EXC N/C,NEW | $0 |
| 8460190150 | FLAT-SUR GRIND MA,MTL REMOV,ACC0.01MM,EX N/C,NESOI | $0 |
FLAT-SURF GRIND MACH, NESOI, USED/REBUILT
18 no
FLAT-SUR GRIND MAC,RECIP-TAB,MTL REMOV,EXC N/C,NEW
FLAT-SUR GRIND MA,MTL REMOV,ACC0.01MM,EX N/C,NESOI
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 |
|---|---|---|---|
| Ohio | $276K | $34K | -$242K |
| California | $287K | -- | -$287K |
| Michigan | $5K | $231K | +$226K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $319K | -- | -$319K |
| NORFOLK-NEWPORT NEWS, VA | $259K | -- | -$259K |
| CLEVELAND, OH | -- | $187K | +$187K |