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
15.8%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) 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