Crystal Grinder Workhead Spindle Bearing from Canada
High-precision angular contact bearing assembly designed for workhead spindles on crystal grinders (8429) to support 5000+ RPM during semiconductor boule diameter reduction. Contamination-resistant. 8431.49.9020.
Duty Rate — Canada → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Specify ABEC/ISO precision class (P4/P2) and cleanroom compatibility
• Bearing life ratings (10,000+ hours) support machinery specificity
• Commodity bearings risk 8482 classification