Crystal Boule Diameter Grinder Workhead from Canada
Precision workhead assembly with servo drive for grinding semiconductor boules to diameters from 150-450mm with 0.01mm tolerance. Part of crystal grinder machinery for heading 8430. Classifies 8431.49.90.
Duty Rate — Canada → 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
• Provide servo accuracy specs and boule material compatibility (Si, GaAs)
• Avoid complete machine classification under 8460
• CNC certification often required