Silicon Nitride Ceramic Roller Bearings from Japan
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.
Duty Rate — Japan → United States
14%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• 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