Precision Copper Balls for Float Zone Crystal Grower Bearings from China
High-purity copper alloy balls for vacuum bearings in float zone crystal growers that produce semiconductor boules from polycrystalline silicon rods. Classified under HTS 8482.91.0015 due to statistical note 6 designation for copper alloy balls in semiconductor material growth equipment. Essential for precise rotation control in ultra-clean processing.
Duty Rate — China → United States
41.9%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Import Tips
• Include technical specs showing tolerance levels (e.g
• sphericity <1μm) proving semiconductor-grade precision
• Submit end-user statements confirming incorporation into statistical note 6 equipment
• Verify RoHS compliance documentation for cleanroom certification