Crystal Grinder Pneumatic Compressor Cylinder from China
Cylinder housing for hermetic pneumatic compressors powering the grinding spindles in crystal grinders that shape semiconductor boules to precise wafer diameters and flats. Provides contamination-free compressed air for high-speed precision grinding. Under 8414.90.41.55 as part of 8414.40 compressors for wafer preparation equipment.
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 flat orientation specs linking to conductivity/resistivity marking requirements in statistical notes
• Certify cylinder materials for semiconductor cleanroom use (no particle generation)
• Prevent 8414.80 classification by proving hermetic compressor design