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HSChapter 84
U.S. imports of centerless grinding machines, numerically controlled (HS 846022) totaled $458K in April 2026, traded with 6 countries.
Importers of Centerless Grinding Machines, Numerically Controlled paid $66K in duties in April 2026 — an effective duty rate of 14% on $458K in dutiable value, based on actual customs collections rather than the published tariff schedule. Centerless Grinding Machines, Numerically Controlled imports of $458K in April 2026 ran 12% above the year-to-date monthly average of $410K.
Last updated: April 2026 dataCenterless grinding machines — which support the workpiece between a grinding wheel and a regulating wheel rather than between centers — are essential for high-volume cylindrical part production in automotive, bearing, and fastener manufacturing. Japan and Germany lead US imports of numerically controlled centerless grinders, reflecting the deep precision-machine-tool industries in both countries. The US tariff schedule separates used or rebuilt machines (8460220040) from new machines (8460220080), and importers should assess Section 301 exposure based on the declared country of origin. The centerless configuration is a key classification criterion distinguishing these machines from other cylindrical grinders under heading 846023.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The defining feature is the workpiece support method: centerless grinders hold the part between a grinding wheel and a regulating wheel without using centers or chucks. Machines that grip the workpiece between centers or in a chuck are classified as cylindrical grinders under 846023, not as centerless grinders under 846022. Technical drawings or manufacturer specifications confirming the support mechanism are the key supporting documents.
Yes. The US schedule assigns separate 10-digit lines to used or rebuilt machines (8460220040) and new machines (8460220080), and duty rates may differ between them. Accurate condition declaration, supported by documentation such as prior ownership records or refurbishment invoices, is required at entry.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | -- | $1.4M | +$1.4M |
| ITALY | $307K | -- | -$307K |
| TAIWAN | $124K | -- | -$124K |
| NEW ZEALAND | $27K | -- | -$27K |
| INDIA | -- | -- | -- |
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 |
|---|---|---|---|---|
| 8460220080 | CENTERLESS GRIND MACH, NUM CONTROLLED,NEW | $431K | 14.40% | $62K |
| 8460220040 | CENTERLESS GRIND MACHINES, NUM CONTROL,USED/REBULT | $27K | 14.40% | $4K |
CENTERLESS GRIND MACH, NUM CONTROLLED,NEW
CENTERLESS GRIND MACHINES, NUM CONTROL,USED/REBULT
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460220080 | CENTERLESS GRIND MACH, NUM CONTROLLED,NEW | $1.4M |
| 8460220040 | CENTERLESS GRIND MACHINES, NUM CONTROL,USED/REBULT | $0 |
CENTERLESS GRIND MACH, NUM CONTROLLED,NEW
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CENTERLESS GRIND MACHINES, NUM CONTROL,USED/REBULT
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 |
|---|---|---|---|
| Illinois | -- | $1.4M | +$1.4M |
| Wisconsin | $307K | -- | -$307K |
| California | $124K | -- | -$124K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| DETROIT, MI | -- | $1.2M | +$1.2M |
| NORFOLK-NEWPORT NEWS, VA | $307K | -- | -$307K |
| PORTAL, ND | -- | $164K | +$164K |