Alloy Steel Bearing Balls for Semiconductor Wafer Crystal Pullers
Precision-ground alloy steel balls used in the high-speed rotating mechanisms of Czochralski crystal pullers for growing monocrystalline silicon boules in semiconductor manufacturing. These balls ensure minimal friction and precise alignment under extreme thermal conditions. Classified under HTS 8482.91.0010 as balls of alloy steel for ball bearings.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as integral part of crystal puller machinery
Parts suitable solely for semiconductor wafer manufacturing equipment classified with the complete machine.
If considered other bearing parts rather than balls
Non-ball roller bearing components for semiconductor equipment fall under separate parts provision.
If imported in semi-finished form without precision grinding
Unprocessed alloy steel balls not meeting bearing tolerances classified as semi-finished steel products.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify alloy steel composition meets ASTM standards with material certificates to avoid reclassification as carbon steel
• Include end-use documentation proving semiconductor application for potential duty exemptions under tech agreements
• Ensure sphericity tolerance specs (e.g
• Grade 5 or better) are documented to confirm classification as bearing balls
Related Products under HTS 8482.91.00.10
High-Chrome Alloy Steel Balls for Wafer Grinding Machines
High-chromium alloy steel balls employed in the spindle bearings of wafer grinders that shape semiconductor crystal boules to exact diameters. These provide corrosion resistance and durability during continuous precision grinding operations. Falls under HTS 8482.91.0010 as alloy steel bearing balls.
Stainless Alloy Steel Balls for Wafer Slicing Saw Bearings
Corrosion-resistant stainless alloy steel balls for the high-precision bearings in wafer slicing saws that cut monocrystalline semiconductor boules into thin wafers. Designed for ultra-low vibration to maintain cut accuracy within microns. HTS 8482.91.0010 covers these alloy steel bearing balls.
Vacuum-Compatible Alloy Steel Balls for Float Zone Crystal Growers
Specially alloyed steel balls for vacuum-rated bearings in float zone crystal growers producing ultra-pure silicon for power semiconductors. Low outgassing materials prevent contamination during high-temperature zone refining. Classified as alloy steel balls under HTS 8482.91.0010.
Precision 52100 Alloy Steel Balls for Wafer Lapping Machine Spindles
Grade 5 precision 52100 chrome alloy steel balls for the main spindles in wafer lapping equipment that achieve sub-micron flatness on semiconductor wafers prior to device fabrication. Through-hardened for maximum fatigue resistance. HTS 8482.91.0010 for alloy steel bearing balls.