Rotor Retaining Ring for High-Speed Alternators from China
High-strength alloy steel retaining ring that secures rotor windings against centrifugal forces in AC generators spinning at 1500+ RPM under 8501.64.0110. Forged specifically for wind turbine alternator rotor assemblies. Falls under 8503.00.95.46 as a principal part of these machines.
Duty Rate — China → United States
38%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Import Tips
• Provide material certificates showing tensile strength >1400 MPa required for MW generator speeds
• Include CAD drawings demonstrating precise rotor slot dimensions matching 8501.64.0110 alternators
• Distinguish from aircraft/engine parts by proving electrical generator (not mechanical drive) application