Crystal Boule Grinder Hoist Assembly from Mexico
Hoist system integrated with grinders to precisely shape semiconductor crystal boules to wafer diameters and add conductivity flats. HTS 8431.10.00 applies as part of 8425 machinery, matching statistical note (a)(ii)(A) for crystal grinders in wafer prep.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit engineering drawings highlighting hoist integration and flat-grinding specs for customs verification
• Obtain advance ruling on 'precise diameter' tolerance to confirm 8425 principal use