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SITCSection 7
U.S. imports of non-numerically controlled flat-surface grinding machines (≥0.01 mm accuracy) (SITC 73162) totaled $975K in April 2026, traded with 14 countries.
Importers of Non-Numerically Controlled Flat-Surface Grinding Machines (≥0.01 mm Accuracy) paid $146K in duties in April 2026 — an effective duty rate of 15% on $975K in dutiable value, based on actual customs collections rather than the published tariff schedule. Non-Numerically Controlled Flat-Surface Grinding Machines (≥0.01 mm Accuracy) imports of $975K in April 2026 ran 35% below the year-to-date monthly average of $1.5M.
Last updated: April 2026 dataFlat-surface grinding machines in this heading achieve positioning accuracy of at least 0.01 mm in any single axis but operate without numerical control — a specification threshold that directly determines classification and separates precision manual grinders from their CNC counterparts. These machines are workhorses in tool-and-die shops, mold making, and precision parts finishing where operator skill compensates for the absence of programmable control. The 0.01 mm accuracy floor is a hard classification criterion; machines that cannot meet this tolerance fall into a different SITC heading, making manufacturer calibration certificates important import documents.
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CBP may request manufacturer technical specifications, calibration certificates, or test reports confirming that the machine's positioning system meets the stated accuracy threshold. ISO or equivalent metrology documentation from the manufacturer is the most straightforward way to substantiate the classification.
Flat-surface grinders are designed to produce planar workpiece surfaces using a rotating abrasive wheel traversing a reciprocating or rotary table. Cylindrical, centerless, and profile grinders serve different geometries and fall under separate SITC headings. The machine's table configuration and wheel orientation are the primary distinguishing features.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| TAIWAN | $378K | -- | -$378K |
| ITALY | $298K | -- | -$298K |
| THAILAND | $211K | -- | -$211K |
| GERMANY | $40K | -- | -$40K |
| CZECH REPUBLIC | $27K | -- | -$27K |
Monthly import values over time