U.S. imports of Numerically Controlled Tool & Cutter Sharpening Machines, Metal Removing (HS 846031) totaled $3.9M in September 2026, imported from 16 countries.
Importers of Numerically Controlled Tool & Cutter Sharpening Machines, Metal Removing paid $463K in duties in September 2026, an average duty rate of 11.76% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: September 2026 dataNumerically controlled tool and cutter grinding machines restore the cutting geometry of end mills, drills, reamers, and other rotary cutting tools — a function critical to maintaining productivity in precision machining operations. Australia leads US imports of NC sharpening machines in this heading, an unusual sourcing pattern that reflects specialized manufacturers serving the Asia-Pacific tooling market. The US schedule splits the heading into used or rebuilt machines (8460310040) and new machines (8460310080). Importers should distinguish these machines from general cylindrical or profile grinders: the defining characteristic is the machine's design purpose for sharpening or re-grinding cutting tools rather than producing finished workpiece dimensions.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
25 import shipments a month
The key is design intent and configuration: tool and cutter grinders are purpose-built to restore or create the complex relief angles, rake faces, and flute geometries of cutting tools such as end mills and drills. A general cylindrical grinder produces round workpiece surfaces to dimensional tolerances. Manufacturer documentation describing the machine's intended application and its fixture and wheel-dressing capabilities for tool geometry are the primary classification evidence.
Machines originating from countries subject to Section 301 tariffs may carry additional duties. Because Australia leads supply in this heading and is not currently subject to Section 301 measures, Australian-origin machines may avoid that exposure — but importers should verify current applicability for all origin countries with a licensed customs broker, as measures and exclusions are subject to change.
ImportsExports
Imports
$3.9MYoY · free account
Exports
—YoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $45.8M of Numerically Controlled Tool & Cutter Sharpening Machines, Metal Removing.
Through September 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Subheading 4 of 10 in heading 8460
Subheading 846031 · $3.9M of $104.9M
Trade Directory
List your company under HS 846031 — Numerically Controlled Tool & Cutter Sharpening Machines, Metal Removing, so the companies trading it can find you. Be the first supplier listed.
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 |
|---|---|---|---|---|---|
| 8460310080 | Sharpening Mach, Metal Removing, N/C, New | $4.6M | 7.82% | 85.41% | $358K |
| 8460310040 | Sharpening Mach, Metal Removing, N/C, Used/Rebuilt | $30K | 10.00% | 100.00% | $3K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460310080 | Sharpening Mach, Metal Removing, N/C, New | $806K |
| 8460310040 | Sharpening Mach, Metal Removing, N/C, Used/Rebuilt | $293K |
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 · September 2026
origin
Australia and Switzerland together supply 69% of it. Thailand pays 16.9% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
9.6% enters free of duty; duty collected equals 11.76% of imports for consumption.