Harmonized System
U.S. imports of Other Cylindrical Grinding Machines, Numerically Controlled (HS 846023) totaled $15.6M in August 2026, imported from 14 countries.
Importers of Other Cylindrical Grinding Machines, Numerically Controlled paid $1.7M in duties in August 2026, an average duty rate of 10.65% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Other Cylindrical Grinding Machines, Numerically Controlled imports of $15.6M in August 2026 ran 26% above the year-to-date monthly average of $12.3M.
Last updated: August 2026 dataNumerically controlled cylindrical grinders — covering internal, external, and universal configurations other than centerless — are precision workhorses for aerospace engine components, hydraulic cylinders, and transmission shafts. Switzerland and Germany dominate US imports of these machines, a pattern consistent with the high-tolerance requirements of the industries they serve. The US schedule provides five 10-digit lines under this heading, distinguishing used machines (8460230040), new internal cylindrical grinders (8460230055), new external/universal cylindrical grinders (8460230065), and additional new machine categories (8460230075, 8460230080). Correct line selection requires identifying both the grinding geometry (internal vs. external) and the machine's condition.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
24 import shipments a month
Manufacturer technical specifications, machine drawings, and sales literature that clearly identify the spindle orientation and workpiece geometry are the standard supporting documents. Internal cylindrical grinders (8460230055) are configured to grind bores and internal surfaces, while external/universal machines (8460230065) grind outside diameters. A universal machine capable of both operations is classified with external cylindrical grinders under 8460230065.
Both countries have long-established precision machine-tool industries with deep expertise in high-tolerance cylindrical grinding, particularly for aerospace and automotive drivetrain applications. The technical specifications demanded by US end-users in those sectors — sub-micron roundness tolerances, thermal stability, and advanced NC control integration — align closely with the product lines that Swiss and German manufacturers have developed over decades.
Subheading 2 of 10 in heading 8460
Subheading 846023 · $15.6M of $104.9M
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ImportsExports
Imports
$15.6MYoY · free account
Exports
$3.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $129.3M of Other Cylindrical Grinding Machines, Numerically Controlled and exported $23.7M.
Through August 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 8460230075 | Oth Cylindrical Grind Machines, Num Ctrl, New, Nes | $6.1M | 8.11% | 81.14% | $492K |
| 8460230055 | Oth Cylin Grind Mach, Num Ctrl New, Internal Cylin | $4.6M | 12.23% | 100.00% | $567K |
| 8460230065 | Oth Cylin Grind Mach, Num Ctrl New, Ext Cyl, Incl Unv | $3.8M | 12.50% | 100.00% | $479K |
| 8460230040 | Other Cylindrical Grind Mach, Num Controlled, Used | $1.1M | 11.62% | 100.00% | $123K |
| 8460230080 | Other Cylindrical Grind Machines, Num Contrl, New | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460230080 | Other Cylindrical Grind Machines, Num Contrl, New | $2.4M |
| 8460230040 | Other Cylindrical Grind Mach, Num Controlled, Used | $647K |
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 · August 2026
origin
Switzerland and Japan together supply 55% of it. Switzerland pays 12.5% duty; France 0.0%.
customs district
destination
entry
rate provision · imports
7.3% enters free of duty; duty collected equals 10.65% of imports for consumption.