Zirconia Ceramic Ball Bearings
High-precision zirconia ceramic ball bearings designed for laboratory equipment and chemical processing machinery. Fired from zirconium oxide at high temperatures, they offer exceptional hardness, corrosion resistance, and low friction for technical applications. Classified under HTS 6909.19.50.10 as ceramic wares for laboratory, chemical, or other technical uses specifically as bearings.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when assembled into complete bearing units with races
Assembled ball or roller bearings fall under Chapter 84 as machinery parts, not raw ceramic wares.
If unfired or only heated below 800°C
Chapter 69 requires firing after shaping; low-temperature processed items go to heading 6903 for refractory ceramics.
If for ceramic ferrules used in fiber optic connectors
Other ceramic technical components like ferrules are distinguished from bearings in statistical suffixes.
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Import Tips & Compliance
• Verify firing temperature exceeds 800°C and material is nonmetallic inorganic per Chapter 69 notes to avoid exclusion
• Provide material composition certificates confirming ceramic properties like low water absorption for technical classification
• Avoid misclassification as machinery parts under Chapter 84; emphasize standalone bearing function in technical docs
Related Products under HTS 6909.19.50.10
Silicon Nitride Ceramic Roller Bearings
Silicon nitride ceramic rollers for high-speed technical applications in chemical pumps and lab centrifuges. These fired ceramic components provide superior wear resistance and thermal stability in harsh environments. HTS 6909.19.50.10 covers them as ceramic wares for chemical or technical uses.
Alumina Ceramic Thrust Bearings
Aluminum oxide (alumina) ceramic thrust bearings for precision instruments in chemical analysis labs. Fired to achieve high compressive strength and electrical insulation for technical operations. Fits HTS 6909.19.50.10 for ceramic bearings in laboratory/chemical uses.
Silicon Carbide Ceramic Sleeve Bearings
Silicon carbide ceramic sleeve (bushings) bearings for corrosive chemical processing equipment. High-fired for extreme hardness and chemical inertness in technical applications. Classified as ceramic bearings under HTS 6909.19.50.10.
Zirconia Toughened Alumina Bearing Balls
ZTA (zirconia toughened alumina) ceramic balls for high-load technical bearings in laboratory stirrers. Composite ceramic fired for enhanced fracture toughness in chemical environments. HTS 6909.19.50.10 applies to these ceramic technical bearings.
Boron Nitride Ceramic Bearing Rollers
Boron nitride ceramic rollers for vacuum laboratory systems and chemical reactors. Hexagonal BN structure fired for lubricity and thermal shock resistance in technical uses. Covered by HTS 6909.19.50.10 as ceramic bearings.
Ceramic Hybrid Deep Groove Ball Bearings
Deep groove bearings with ceramic balls and steel races imported as technical ceramic components for chemical machinery. Zirconia or silicon nitride balls provide key anti-corrosion properties. Classed under HTS 6909.19.50.10 for the ceramic bearing elements.