Seed Crystal Rotation Mechanism from United States
A seed crystal rotation mechanism is a motorized device that rotates the seed crystal at precise speeds during Czochralski pulling to ensure uniform boule diameter. It is a critical part for heading 84.28 crystal growers, and is classified under tariff item 8431.39.00 as 'other' parts.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the mechanism is a part of a crystal grower of heading 84.28, not a standalone motor
• Provide technical drawings showing its integration into the grower system
• Verify if the mechanism qualifies for the Machinery Remission Program