Dia-Pitch Ball Screw for Semiconductor Crystal Pullers from China
Dia-pitch ball screw providing ultra-smooth constant velocity motion for Czochralski crystal pullers growing silicon boules. Vibration-damped design per statistical notes, HTS 8483.40.80.00 classification.
Duty Rate — China → United States
41.3%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 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
• Reference statistical note (a)(i) crystal growers in documentation for semiconductor context
• Document ultra-low friction coefficient (<0.003) and velocity uniformity specs
• Include contamination control measures (e.g
• PEEK nut material) for cleanroom use