Crystal Boule Grinder Spindle Assembly from Germany
High-precision spindle with diamond-impregnated quill for crystal grinders (8426.30) that shape silicon boules to exact wafer diameters and flats indicating resistivity. Falls under 8431.49.1010 as part for semiconductor-specific grinding machinery.
Duty Rate — Germany → 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
• Submit cross-section diagrams showing integration with grinder head
• Classify as complete assembly, not individual bearings (8483), when imported together