Wafer Grinder Spindle Air Bearing Compressor Housing from China
Precision housing for hermetic compressors generating clean compressed air for air bearing spindles in wafer grinders, maintaining sub-micron runout for boule diameter control. Essential for semiconductor wafer flat preparation. Under 8414.90.41.55 for crystal grinder compressors.
Duty Rate — China → United States
35%
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 air bearing pressure specs linking to grinder tolerance requirements
• Certify housing for zero particle shedding in cleanroom
• Prove 8414.40 compressor parent vs 8411 turbine classification