Seed Crystal Rotation Mechanism from Germany
Motorized mechanism that rotates the seed crystal at precise speeds during Czochralski pulling to ensure uniform boule diameter. Critical part for heading 8428 crystal growers. 8431.39.00 classification.
Duty Rate — Germany → United States
10%
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
• RPM/torque specs for 300-500mm boules; vibration isolation certs
• Common issue: motor classified separately under 8501