Hardened Steel Inner Ring for Crystal Puller Bearings from Mexico
High-hardness alloy steel inner ring for thrust ball bearings in Czochralski crystal pullers, enabling rotation of the seed crystal during monocrystalline silicon boule growth. Essential for maintaining precise speeds under extreme thermal conditions in semiconductor material production. Falls under 8482.99.25 as an other bearing ring not specified elsewhere.
Duty Rate — Mexico → United States
30.8%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) of U.S. note 16 to this subchapter
9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter
Import Tips
• Provide heat treatment and hardness certification (e.g
• Rockwell scale) to substantiate suitability for semiconductor equipment
• Declare end-use in Chapter 84 statistical notes for potential duty relief on semiconductor manufacturing parts
• Watch for reclassification as complete crystal grower parts under 8479 if not imported separately