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HSChapter 68
U.S. imports of grinding wheels & similar articles of agglomerated diamond (HS 680421) totaled $17.7M in April 2026, traded with 38 countries.
Last updated: April 2026 dataAgglomerated diamond grinding wheels and related abrasive tools — including circular saw blade segments — are subject to Section 301 tariffs when sourced from China, making South Korea and Italy, the two leading US suppliers, strategically important alternatives for precision tooling buyers. The US schedule distinguishes circular saw blade segments with diamond agglomerated with metal (6804210010), articles with continuous rim segments on a circular plate (6804210020), multi-segment diamond articles on a circular plate set not for cutting (6804210030), and all other agglomerated diamond abrasives (6804210090). These products are critical inputs for stone fabrication, semiconductor wafer slicing, and construction cutting operations, where diamond bond type and segment geometry directly affect performance specifications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Segments — the individual diamond-impregnated tips or blocks designed to be brazed or laser-welded onto a steel core — classify under 6804210010 when imported separately. A complete assembled diamond circular saw blade, with segments already attached to the steel core, classifies under heading 8202 as a saw blade rather than under 6804. The import condition (segment alone versus assembled blade) controls the classification.
The 6804.21 subheadings specifically cover diamond agglomerated with metal bonds; resin-bonded, vitrified-bonded, or electroplated diamond tools are not agglomerated in the same sense and may classify under 6804.22 (other agglomerated abrasives) or elsewhere depending on construction. Importers should confirm the bond matrix — metal, resin, or vitrified — before selecting the applicable 10-digit line.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $4.6M | $38K | -$4.6M |
| ITALY | $2.7M | $93K | -$2.6M |
| TAIWAN | $397K | $1.3M | +$940K |
| MEXICO | $357K | $1.4M | +$994K |
| CANADA | $156K | $1.4M | +$1.2M |
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Monthly import values over time