Precision Ground Ball Bearing Raceway Ring from Japan
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 — Japan → United States
19.9%
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
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