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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for use in semiconductor testing equipment
Parts of testing apparatus (some Chapter 90 equipment) may fall under machines not elsewhere specified.
If considered other articles of alloy steel
Precision balls not specifically for bearings could default to Chapter 73 steel articles.
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Import Tips & Compliance
• Document vacuum certification (e.g
• <10^-8 Torr outgassing) and cleanroom packaging requirements
• Use 'semiconductor crystal grower parts' on commercial invoice for proper statistical reporting
• Avoid generic 'bearing balls' descriptions to prevent misclassification as automotive/general use
Related Products under HTS 8482.91.00.10
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.
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.
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.