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.
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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
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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
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Precision 52100 Alloy Steel Balls for Wafer Lapping Machine Spindles
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