Precision Roller Set for Wafer Lapping Machine Bearings
Matched set of super-precision cylindrical rollers for bearings in wafer lappers that achieve mirror-surface flatness before device fabrication. Silicon nitride coated for contamination-free operation in cleanrooms. Part of 8482.99.65.60 for semiconductor wafer preparation bearings.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If rollers made entirely of advanced ceramics
Predominantly ceramic articles classify in Chapter 69 regardless of function.
If for use in semiconductor testing equipment bearings
Testing apparatus bearings have distinct statistical provisions per Chapter notes.
Not sure which classification is right?
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Import Tips & Compliance
• Include cleanroom certification (ISO 3 compatible) and coating specs for classification
• Specify roller diameter tolerances (<1μm) proving semiconductor precision requirement
• Bundle with complete bearing assembly documentation if imported as maintenance kit
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