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HSChapter 84
U.S. imports of honing or lapping machines for removing metal (HS 846040) totaled $1.0M in April 2026, traded with 15 countries.
Importers of Honing or Lapping Machines for Removing Metal paid $147K in duties in April 2026 — an effective duty rate of 14% on $1.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Honing or Lapping Machines for Removing Metal imports of $1.0M in April 2026 ran 44% below the year-to-date monthly average of $1.8M.
Last updated: April 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.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
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.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| ITALY | $618K | -- | -$618K |
| SWITZERLAND | -- | $566K | +$566K |
| CANADA | -- | $318K | +$318K |
| UNITED KINGDOM | $204K | $10K | -$194K |
| GERMANY | $30K | $167K | +$137K |
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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 |
|---|---|---|---|---|
| 8460408080 | HONING/LAPP MACH,EXC NUM CNTRD,NEW,GT $3025 EACH | $565K | 14.40% | $81K |
| 8460404060 | HONING/LAPPING MACH,MTL REMOV, N/C, OV $3,025, NEW | $455K | 14.40% | $66K |
| 8460404010 | HONING OR LAPPING MACHINES,NUMERICAL CONTRLD, USED | $0 | -- | -- |
| 8460408010 | HONING OR LAPPING MACHINES,EXEP NUMER CONTRLD,USED | $0 | -- | -- |
| 8460408020 | HONING OR LAPPING MACH,MTL REMOV,UNDER $3,025, NEW | $0 | -- | -- |
HONING/LAPP MACH,EXC NUM CNTRD,NEW,GT $3025 EACH
HONING/LAPPING MACH,MTL REMOV, N/C, OV $3,025, NEW
HONING OR LAPPING MACHINES,NUMERICAL CONTRLD, USED
HONING OR LAPPING MACHINES,EXEP NUMER CONTRLD,USED
HONING OR LAPPING MACH,MTL REMOV,UNDER $3,025, NEW
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8460400060 | HONING/LAPPING MACH,MTL REMOV, N/C, OV $3025, NEW | $928K |
| 8460400080 | HONING/LAPPING MACH,MTL REMOV,EX N/C, OV $3025,NEW | $539K |
| 8460400010 | HONING OR LAPPING MACHINES, METAL REMOVING, USED | $201K |
| 8460400020 | HONING OR LAPPING MACH,MTL REMOV,UNDER $3025 NEW | $29K |
HONING/LAPPING MACH,MTL REMOV, N/C, OV $3025, NEW
24 no
HONING/LAPPING MACH,MTL REMOV,EX N/C, OV $3025,NEW
30 no
HONING OR LAPPING MACHINES, METAL REMOVING, USED
6 no
HONING OR LAPPING MACH,MTL REMOV,UNDER $3025 NEW
230 no
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Missouri | -- | $761K | +$761K |
| California | $440K | $10K | -$430K |
| Illinois | $173K | $272K | +$99K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NORFOLK-NEWPORT NEWS, VA | $448K | $566K | +$118K |
| CHICAGO, IL | $195K | $167K | -$28K |
| LOS ANGELES, CA | -- | $226K | +$226K |