Steel Inner Bearing Race for Semiconductor Wafer Pullers
Precision-machined steel inner race designed for high-speed spindle bearings in Czochralski crystal pullers used to grow monocrystalline silicon boules. Classified under 8482.99.2580 as an other inner ring for specialized industrial bearings, distinct from standard automotive or machinery applications. Essential component ensuring rotational stability during semiconductor crystal growth process.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically for ball bearings
Ball bearing inner races classified separately from roller bearing races under distinct subheading.
If imported as integral part of complete crystal puller machinery
Parts integral to semiconductor manufacturing machines may classify with the complete machine.
If for precision measurement equipment spindles
Races for metrology equipment testing semiconductor wafers often fall under Chapter 90.
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Import Tips & Compliance
• Verify material certification meets AISI 52100 standards for bearing steel; include end-use statement for semiconductor equipment to avoid reclassification; ensure dimensional tolerances documented for customs valuation
Related Products under HTS 8482.99.25.80
Hardened Outer Bearing Ring for Wafer Slicing Saws
Chrome steel outer ring engineered for diamond wire wafer slicing saws that cut monocrystalline semiconductor boules into thin wafers. Falls under 8482.99.2580 as other outer race for specialized precision bearings in semiconductor processing equipment. Provides critical radial support during high-precision slicing operations.
Ceramic Hybrid Inner Race for Wafer Grinder Spindles
Silicon nitride ceramic inner race paired with steel balls for high-speed wafer grinders that achieve dimensional tolerances on semiconductor wafers. Classified in 8482.99.2580 as other inner ring for semiconductor manufacturing bearings requiring extreme flatness and wear resistance. Used in back-grinding processes for wafer thinning.
Precision Steel Race for Crystal Boule Grinders
Through-hardened steel race for grinders that shape semiconductor crystal boules to exact diameters before wafer slicing. HTS 8482.99.2580 classification for other bearing races used in semiconductor boule preparation equipment. Critical for maintaining crystal orientation flats indicating conductivity type.
High-Speed Outer Race for Wafer Lapping Machines
Special alloy steel outer race for lapping machines that polish semiconductor wafers to mirror finish before device fabrication. 8482.99.2580 as other outer ring for semiconductor wafer preparation bearings operating at 3000+ RPM. Ensures uniform material removal across 300mm wafers.
Tapered Roller Race for Float Zone Crystal Pullers
Tapered roller bearing race for float zone crystal growers producing ultra-pure silicon for power semiconductors. Classified 8482.99.2580 as other race for specialized semiconductor manufacturing equipment bearings. Supports vertical axis during RF heating zone travel.