Crystal Boule Grinder Workholding Chuck

Precision workholding chuck for securing semiconductor crystal boules during diameter grinding to wafer specifications. This mechanical part ensures accurate rotation without electrical components. Under 8487.90.00 for unspecified semiconductor grinding machinery parts.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.9%+35.0%38.9%
🇲🇽Mexico3.9%+10.0%13.9%
🇨🇦Canada3.9%+10.0%13.9%
🇩🇪Germany3.9%+10.0%13.9%
🇯🇵Japan3.9%+10.0%13.9%

More Specific Codes

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Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

8466.93.60Lower: 35% vs 38.9%

If for general metalworking grinders

Parts for ordinary grinding machines without semiconductor specificity go to 8466.

8486.40.00Lower: 25% vs 38.9%

If when supplied as complete grinding apparatus

Assembled crystal grinders are semiconductor processing machines.

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Import Tips & Compliance

Provide engineering drawings showing mechanical-only design

Confirm compatibility only with boule grinders for semiconductor crystals

Pitfall: classification as general machine tool part under 8466

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