Unground Steel Ball Bearings for Wafer Crystal Pullers from China
These unground steel ball bearings are preliminary components used in the rotating mechanisms of Czochralski crystal pullers for growing monocrystalline silicon boules in semiconductor manufacturing. They fall under HTS 8482.10.50.04 as unground ball bearings, which are unfinished and require further grinding before final use. Their rough surface finish distinguishes them from polished bearings in other subheadings.
Duty Rate — China → United States
44%
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
• Verify bearing dimensions and material certifications match statistical note requirements for semiconductor equipment to avoid reclassification
• Include manufacturer specs confirming unground status (Ra > 0.8 μm surface roughness) in entry documentation to prevent duty disputes