Crystal Boule Grinder Collet Chuck from Canada
Adjustable collet chuck attachment that mounts on crystal grinders (heading 8429 equipment) to securely hold semiconductor boules during diameter grinding and flat notching for wafer preparation. Made of hardened steel or carbide. Classified in 8431.49.9020 as other machinery mounting attachment.
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
• Include grind tolerance specs (±0.01mm) in invoices to prove semiconductor precision
• Pair with boule grinder photos/install diagrams for smooth customs clearance