Zirconia Toughened Alumina Bearing Balls from Japan
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.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• 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