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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imitating jewelry articles
Chapter 69 excludes Chapter 71 imitation jewelry; spherical forms could be misseen as beads.
If unglazed tiles over 3.2cm thick
US note excludes thick tiles from 6907; cylindrical bearings distinguished by function.
If other ceramic bushes
Statistical suffix .20 for bushes vs .10 specifically for bearings.
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Import Tips & Compliance
• Include engineering drawings showing bearing geometry to prevent classification as mere spheres
• For immediate use in US manufacturing, consider marking requirements under 19 CFR 134
• Batch test for translucency/water absorption if claiming porcelain per US notes
Related Products under HTS 6909.19.50.10
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.
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.
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.