Roller Retainer for Crystal Boule Grinders
Special alloy retainer assembly holding cylindrical rollers in bearings for crystal grinders that shape semiconductor boules to exact wafer diameters. Withstands abrasive silicon carbide particles during flat grinding operations. HTS 8482.99.65.60 applies to such parts for cylindrical roller bearings in semiconductor crystal preparation.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for general cylindrical roller bearings not semiconductor-specific
Lack of semiconductor processing documentation shifts to other/other provisions.
If parts of crystal-growing furnaces themselves
Furnace mechanical parts may classify with the thermal equipment in 8439.
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Import Tips & Compliance
• Provide photos/engineering data showing anti-abrasion coatings specific to silicon grinding
• Confirm bearing OD/ID specs match boule grinder spindles (150-300mm class)
• Document exclusion from float-zone crystal grower applications to use correct suffix
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