Harmonized System
U.S. imports of Honing or Lapping Machines for Removing Metal (HS 846040) totaled $2.3M in August 2026, imported from 19 countries.
Importers of Honing or Lapping Machines for Removing Metal paid $289K in duties in August 2026, an average duty rate of 12.36% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataHoning and lapping machines achieve surface finishes and dimensional tolerances beyond what conventional grinding can deliver — honing is widely used for engine cylinder bores and hydraulic components, while lapping produces the ultra-flat surfaces required in semiconductor and optical manufacturing. Germany and Italy are the leading US import sources, supplying both high-volume automotive honing lines and precision lapping systems. The US schedule provides nine 10-digit lines distinguishing NC from non-NC machines, new from used, and value tiers below and above $3,025, making correct classification dependent on three simultaneous criteria. Importers should retain manufacturer specifications confirming the process type (honing vs. lapping vs. grinding) since the distinction is not always self-evident from machine appearance.
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27 import shipments a month
Honing uses abrasive stones or sticks in a reciprocating and rotating motion to correct bore geometry and improve surface finish, while grinding uses a rotating abrasive wheel to remove larger amounts of material. The process distinction is recognized in the tariff schedule: honing and lapping machines are classified under 846040, separate from grinding machines under 8460. Manufacturer documentation describing the process, tooling type, and typical stock removal rates is the standard supporting evidence.
Working through the criteria in order: the machine is not numerically controlled, so it falls to the non-NC lines; it is new, eliminating the used line; and its value exceeds $3,025, pointing to 8460408080. Importers should document each criterion — NC status from manufacturer specs, condition from the commercial invoice, and value from the declared customs value — to support the classification in the event of a CBP inquiry.
Subheading 6 of 10 in heading 8460
Subheading 846040 · $2.3M of $104.9M
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 |
|---|---|---|---|---|---|
| 8460408080 | Honing/Lapp Mach, Exc Num Cntrd, New, Gt $3025 Each | $1.5M | 11.47% | 100.00% | $174K |
| 8460404060 | Honing/Lapping Mach, Mtl Remov, N/C, Ov $3,025, New | $815K | 14.00% | 89.84% | $114K |
| 8460408020 | Honing or Lapping Mach, Mtl Remov, Under $3,025, New | $5K | 14.88% | 100.00% | $715 |
| 8460404010 | Honing or Lapping Machines, Numerical Contrld, Used | — | -- | -- | -- |
| 8460408010 | Honing or Lapping Machines, Exep Numer Contrld, Used | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
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.
Trade Directory
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ImportsExports
Imports
$2.3MYoY · free account
Exports
$1.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $26.1M of Honing or Lapping Machines for Removing Metal and exported $24.8M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Italy and India together supply 69% of it. China pays 41.9% duty; Italy 10.0%.
customs district
destination
entry
rate provision · imports
3.5% enters free of duty; duty collected equals 12.36% of imports for consumption.