Tunnel Boring Machine Disc Cutter from Mexico
Large diameter disc cutter ring with tungsten carbide edges for tunnel boring machines (TBMs) under heading 8430. Used to gouge and crush rock faces in underground tunneling projects. Classified in 8431.49.90.34 for parts of tunneling machinery.
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
• Submit detailed CAD drawings showing sole use with TBM cutterheads; declare exact diameter and rock hardness ratings; check for quotas on carbide content