Crystal Boule Diameter Grinder Workhead from Japan
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 — Japan → United States
15%
Rate breakdown
9903.82.2215%Derivative steel articles the product of Argentina, Ecuador, El Salvador, Guatemala, Japan, the Republic of Korea, Liechtenstein, Switzerland, Taiwan, the United Kingdom, or a member nation of the European Union, as provided for in subdivision (c)(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