Standard International Trade Classification
U.S. imports of Non-Numerically Controlled Flat-Surface Grinding Machines (≥0.01 mm Accuracy) (SITC 73162) totaled $2.2M in August 2026, imported from 17 countries.
Importers of Non-Numerically Controlled Flat-Surface Grinding Machines (≥0.01 mm Accuracy) paid $222K in duties in August 2026, an average duty rate of 10.28% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Non-Numerically Controlled Flat-Surface Grinding Machines (≥0.01 mm Accuracy) imports of $2.2M in August 2026 ran 27% above the year-to-date monthly average of $1.7M.
Last updated: August 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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26 import shipments a month
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.
Basic heading 73162 · $2.2M of $172.0B
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Imports · August 2026
origin
Italy and Taiwan together supply 80% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$2.2MYoY · free account
Exports
$25KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $18.7M of Non-Numerically Controlled Flat-Surface Grinding Machines (≥0.01 mm Accuracy).
Through August 2026 · exports 8 of 12 months reported. Source: U.S. Census Bureau.