Wind Turbine Main Gearbox from China
The primary gearbox in a horizontal axis wind turbine that steps up the low rotational speed of the rotor shaft to the high speed required by the generator, typically achieving ratios of 50:1 to 100:1. It falls under HTS 8483.40.50.20 as a fixed ratio speed changer specifically designed for wind turbines per statistical note 6 to chapter 84. These gearboxes handle extreme torque loads from variable wind conditions.
Duty Rate — China → United States
52.5%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) of U.S. note 16 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter
Import Tips
• Obtain wind turbine-specific engineering certifications from manufacturers; declare exact gear ratios and torque ratings; ensure compliance with IEC 61400 standards for turbine components