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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as separate balls or rollers for bearing assembly
Parts of bearings like balls/rollers are classified under 8482.91 if not purely ceramic wares for technical use.
If for investment casting ceramic cores used in molds
Different technical ceramic applications like casting cores fall under heading 6906.
If other unglazed laboratory ceramic labware like crucibles
Bearings are specifically suffixed .10; general technical ceramic articles use .90.
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Import Tips & Compliance
• Include ASTM C373 water absorption test results to confirm ceramic body meets technical ware standards
• Document end-use in laboratory or chemical processing to justify technical classification over general machinery
• Check for cermet content; if metallic binders exceed limits, may shift to heading 8113
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.
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.