Crystal Grinder Workhead Spindle Bearing
High-precision angular contact bearing assembly designed for workhead spindles on crystal grinders (8429) to support 5000+ RPM during semiconductor boule diameter reduction. Contamination-resistant. 8431.49.9020.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ball bearings not precision-rated for semiconductor grinders
Standard ball bearings default to 8482 regardless of end use.
If plain shaft bearings rather than housed spindle assemblies
Bearing housings separate from 8482 balls/races.
If for generalpurpose grinding spindles
Heading 8466 parts cover non-specialized bearings.
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Import Tips & Compliance
• Specify ABEC/ISO precision class (P4/P2) and cleanroom compatibility
• Bearing life ratings (10,000+ hours) support machinery specificity
• Commodity bearings risk 8482 classification
Related Products under HTS 8431.49.90.20
Float Zone Crystal Grower RF Coil
A radiofrequency induction coil attachment for float zone crystal growers (heading 8429 machinery) used to melt and purify silicon rods into monocrystalline boules for wafers. It mounts directly on the grower apparatus to create the molten zone. Classified under 8431.49.9020 as an other attachment for semiconductor processing machinery.
Semiconductor Wafer Edge Grinder Spindle
High-precision spindle attachment that mounts on wafer edge grinders (8429 machinery) to rotate and bevel wafer edges post-slicing for handling safety and yield improvement in semiconductor processing. Classified 8431.49.9020.
Crystal Puller Seed Holder Clip Assembly
Quartz or molybdenum clip assembly that mounts seed crystals in Czochralski pullers (8429) to initiate monocrystalline growth from molten silicon. Withstands 1400°C vacuum conditions. 8431.49.9020 attachment.
Wafer Grinder Coolant Nozzle Manifold
Stainless steel manifold attachment with multiple nozzles that mounts on wafer grinders/lappers (8429) to deliver deionized water coolant precisely during semiconductor wafer surface preparation. 8431.49.9020.
Boule Flattener Diamond Dresser Holder
Carbide holder attachment for mounting industrial diamond dressers on crystal boule flattener/grinders (8429 machinery) to create precise conductivity flats on semiconductor ingots. Ensures orientation accuracy. 8431.49.9020.
Wafer Polishing Head Vacuum Chuck
Porous ceramic vacuum chuck that mounts on polishing heads of wafer polishers (8429) to hold semiconductor wafers flat during final CMP preparation for device fabrication. Critical for nanometer flatness. 8431.49.9020.