Precision 52100 Alloy Steel Balls for Wafer Lapping Machine Spindles
Grade 5 precision 52100 chrome alloy steel balls for the main spindles in wafer lapping equipment that achieve sub-micron flatness on semiconductor wafers prior to device fabrication. Through-hardened for maximum fatigue resistance. HTS 8482.91.0010 for alloy steel bearing balls.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If integral to lapping/polishing machinery
Parts of semiconductor wafer preparation equipment classified with complete machines.
If classified as bearing rollers instead of balls
Cylindrical rollers for the same equipment use different parts subheading.
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Import Tips & Compliance
• Specify 52100 chemical composition (1.0% Cr min) and hardness (Rc 60-66) in technical datasheets
• For sets of balls in bearing races, declare as individual parts unless permanently assembled
• Check quotas on high-precision alloy steel products from certain origins
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