Non-Magnetic Copper Roller Balls for Wafer Grinding Machine Spindles
Copper alloy balls engineered for non-magnetic properties in high-speed spindles of wafer grinders that process crystal boules to precise diameters for semiconductor wafers. HTS 8482.91.0015 applies per statistical note 6 for copper balls in wafer preparation equipment. Critical for maintaining crystal orientation during grinding.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If configured as needles rather than balls
Different bearing element geometries (needles vs. balls) have separate subheadings.
If for interchangeable tooling rather than fixed bearings
Interchangeable grinding tools classify as interchangeable parts of machines.
If bulk copper alloy powder metallurgy products
Unspecified copper alloy articles from powder metallurgy fall under Chapter 74.
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Import Tips & Compliance
• Certify magnetic permeability <1.005 for non-magnetic qualification
• Provide equipment OEM specifications linking balls to wafer grinder models
• Watch for contamination risks—require cleanroom packaging protocols
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