Boule Puller Crucible Rotation Mechanism from Mexico
Servo-driven rotation drive coupling crucible speed to pull rate for uniform silicon boule diameter in Czochralski systems. Principal part for crystal puller machinery heading 8430. Classifies 8431.49.90.
Duty Rate — Mexico → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Rotation speed/torque specs and crucible material compatibility required
• High-temperature lubrication certification needed
• Distinguish from generic gearboxes