Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting, hand sharpening or polishing stones, and parts thereof, of natural stone, of agglomerated natural or artificial abrasives, or of ceramics, with or without parts of other materials

Every line of heading 6804

• 6804 Millstones, grindstones, grinding wheels and the like, without frameworks, for grinding, sharpening, polishing, trueing or cutting, hand sharpening or polishing stones, and parts thereof, of natural stone, of agglomerated natural or artificial abrasives, or of ceramics, with or without parts of other materials.
• 6804.10.00.00 Millstones and grindstones for milling, grinding or pulping (No.): General Free; Special none; Column 2 Free.
• 6804.21.00 Of agglomerated synthetic or natural diamond: General Free; Special none; Column 2 30%.
• 6804.21.00.10 Segments for circular sawblades, consisting of diamond agglomerated with metal (No.).
• 6804.21.00.20 Articles consisting of a continuous rim segment of diamond agglomerated with metal, attached to circular plates of steel (whether or not attached to non-steel plates) (No.).
• 6804.21.00.30 Articles consisting of multiple segments of diamond agglomerated with metal, attached to circular plates of steel, without cutting parts (whether or not attached to non-steel plates) (No.).
• 6804.21.00.90 Other (under: Of agglomerated synthetic or natural diamond) (No.).
• 6804.22 Of other agglomerated abrasives or of ceramics.
• 6804.22.10.00 Bonded with synthetic resins (under: Of other agglomerated abrasives or of ceramics) (kg): General 5¢/kg + 2%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 $1.10/kg + 40%.
• 6804.22.40.00 Abrasive wheels (under: Other) (No.): General Free; Special none; Column 2 20%.
• 6804.22.60.00 Other (under: Other) (kg): General Free; Special none; Column 2 30%.
• 6804.23.00.00 Of natural stone (under: Other millstones, grindstones, grinding wheels and the like) (No.): General Free; Special none; Column 2 Free.
• 6804.30.00.00 Hand sharpening or polishing stones (No.): General Free; Special none; Column 2 Free.

From MFG Calcs data: Abrasives and grinding wheels

U.S. imports of abrasives and grinding wheels (headings 6804, 6805) came to $1.05B in 2025, with $113M in calculated duty: an effective duty of 10.8%, every duty included.

Effective duty in Sep 2026: 10.6%, against 15.3% in Sep 2025.

Largest sources in 2025: Mexico $142M at 0.9% effective duty; Germany $115M at 9.0% effective duty; South Korea $107M at 8.2% effective duty; China $102M at 45.2% effective duty; Canada $85.1M at 1.4% effective duty.

These are family totals from U.S. import statistics published through USITC DataWeb, not this heading's rate alone; effective duty is calculated duty as a share of customs value, an estimate, not a ruling.

• Abrasives and grinding wheels: tariffs and imports
• Abrasives and grinding wheels: landed cost by country
• Abrasives and grinding wheels: reshoring outlook

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.