Super-Precision Needle Rollers
ISO Grade II super-precision needle rollers for air-bearing spindles in wafer flat grinders. Achieve sub-micron diameter tolerances for semiconductor wafers. Classified 8482.91.0090 other.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for air-bearing transmission assemblies
Air bearing components under transmission shaft provisions.
If integral to wafer dimension measuring equipment
Precision measuring machine parts under Chapter 90.
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Import Tips & Compliance
• ISO 492 Grade II certification mandatory; roundness <0.08μm documentation; nitrogen-purged sealed packaging
Related Products under HTS 8482.91.00.90
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Miniature Needle Rollers for Wafer Polishers
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