U.S. exports of Centerless Grinding Machines, Numerically Controlled (HS 846022) totaled $1.1M in September 2026, exported to 7 countries.
Last updated: September 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.
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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.
Subheading 9 of 10 in heading 8460
Subheading 846022 · $1.1M of $11.0M
ImportsExports
Imports
—YoY · free account
Exports
$1.1MYoY · free account
Low of 11 reported months · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $7.2M of Centerless Grinding Machines, Numerically Controlled and exported $11.7M.
Through September 2026 · imports 11 of 12 months reported. Source: U.S. Census Bureau.
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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 |
|---|---|---|---|---|---|
| 8460220080 | Centerless Grind Mach, Num Controlled, New | $422K | 10.00% | 100.00% | $42K |
| 8460220040 | Centerless Grind Machines, Num Control, Used/Rebult | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460220040 | Centerless Grind Machines, Num Control, Used/Rebult | $207K |
| 8460220080 | Centerless Grind Mach, Num Controlled, New | $96K |
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.
Exports · September 2026
destination
Ireland and China together take 96% of it.
customs district
origin
entry
rate provision · imports
None recorded for this period.