Precision Ground Ball Bearing Raceway Ring from China
Outer race with superfinished raceway surface (RMS 8-12 μin) for miniature ball bearings in semiconductor crystal pullers. Critical for maintaining wafer boule diameter precision during grinding processes. Classified as outer ring for ball bearings under HTS 8482.99.05.00.
Duty Rate — China → United States
44.9%
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
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 grind charts and roundness measurements (≤0.5 μm) proving suitability only for ball bearings
• Mark invoices clearly 'outer race for radial ball bearings' to distinguish from thrust or angular contact types
• For high-volume fab imports, consider binding rulings on whether lapped surfaces qualify as 'finished' parts