Synthetic Diamond Honing Stone
Segmented stones of agglomerated synthetic diamond for internal honing of cylinders and bores in engine manufacturing. HTS 6804.21.00 covers these hand-sharpening/polishing stones and similar abrasives. Provides consistent surface finishes for automotive and aerospace parts.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold as complete household grinding tool sets
Assembled sets for home use with handles/frameworks fall under Chapter 82 hand tools.
If of worked natural marble/granite
Building/construction grindstones of worked natural stone (excluded from diamond heading) go to 6802.
If industrial plows/cylinder liners components
Specialized agricultural/industrial machine parts override general abrasive classification.
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Import Tips & Compliance
• Specify grit progression (coarse/medium/fine) and mandrel compatibility in invoices for accurate duty assessment
• Ensure no metal framework inclusion; loose stones classify here vs. complete tools
Related Products under HTS 6804.21.00
Diamond Grinding Wheel for Steel Polishing
A high-precision grinding wheel made from agglomerated synthetic diamond abrasives, designed specifically for polishing and finishing steel surfaces in metalworking applications. It falls under HTS 6804.21.00 due to its composition of agglomerated synthetic diamond used for grinding and polishing without frameworks. These wheels provide superior durability and heat resistance compared to traditional abrasives.
Synthetic Diamond Dressing Wheel
An agglomerated synthetic diamond wheel used for dressing and truing other grinding wheels in precision machining setups. Classified under HTS 6804.21.00 for its diamond abrasive composition tailored for trueing operations. Essential in maintaining wheel geometry for high-tolerance manufacturing.
Agglomerated Diamond Cut-Off Wheel
Thin, resin-bonded wheel of agglomerated synthetic diamond designed for precision cutting of ceramics, glass, and composites. HTS 6804.21.00 applies to its diamond abrasive matrix for cutting operations without frameworks. Widely used in fabrication shops for clean, burr-free cuts.
Diamond Lapping Plate
Flat plate embedded with agglomerated natural diamond particles for ultra-fine lapping of precision optical and semiconductor components. Falls under HTS 6804.21.00 as an abrasive tool for polishing without other frameworks. Achieves mirror finishes on hard materials like sapphire and silicon.
Diamond Deburring Wheel
Agglomerated synthetic diamond wheel optimized for removing burrs from machined metal edges post-CNC operations. Under HTS 6804.21.00 for its diamond abrasives used in finishing and trueing. Critical for quality control in precision manufacturing.
Precision Diamond Grinding Disc
Ultra-thin disc of agglomerated natural diamond for grinding thin wafers in electronics production. HTS 6804.21.00 due to diamond composition for semiconductor polishing/cutting. Enables sub-micron flatness tolerances.