Fixed ratio speed changers
Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof: > Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately; ball or roller screws; gear boxes and other speed changers, including torque converters: > Gear boxes and other speed changers: > Fixed ratio speed changers, multiple and variable ratio speed changers each ratio of which is selected by manual manipulation: > Imported for use with machines for making cellulosic pulp, paper or paperboard > Fixed ratio speed changers
Duty Rate (from China)
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
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8483.40.30.40
Fixed Ratio Gear Reducer for Paper Pulp Agitators
This fixed ratio speed changer is a precision gear reducer designed specifically for use in agitator drives within cellulosic pulp processing machines. It maintains a constant gear ratio to deliver reliable torque multiplication for mixing wood chips and chemicals in pulp digesters. Classified under HTS 8483.40.30.40 due to its importation explicitly for pulp-making equipment.
Constant Ratio Gearbox for Paper Machine Calendars
A robust fixed ratio gearbox engineered for calendar stack drives in paperboard manufacturing lines, providing steady speed reduction for precise roll pressure control. Its non-adjustable gear train ensures consistent performance under high-load conditions typical in paper finishing. Falls under HTS 8483.40.30.40 as it's imported for paperboard production machinery.
Fixed Gear Drive for Paperboard Corrugator Rolls
Fixed ratio gear drive system for corrugating roll stands in paperboard production, ensuring synchronized speed between flute-forming rolls and pressure applications. Helical gears provide smooth, quiet operation essential for high-speed corrugator lines. Imported for use with paperboard machines qualifies it for HTS 8483.40.30.40.
Single Ratio Speed Reducer for Pulp Refiner Drives
Industrial fixed ratio speed reducer tailored for double-disc pulp refiners, converting high-speed motor input to low-speed, high-torque output for fiber fibrillation in cellulosic pulp lines. Built with corrosion-resistant alloys for chemical-laden pulp mill environments. HTS 8483.40.30.40 applies due to its dedicated use in pulp processing machines.
Pulp Digger Speed Changer Gearbox
Heavy-duty fixed ratio speed changer gearbox for vertical pulp digester rotation drives, handling extreme torque loads during continuous cooking of wood chips into pulp. Features splash lubrication and high-capacity bearings for 24/7 pulp mill operation. HTS 8483.40.30.40 designation requires proof of pulp digester application.
Paper Winder Fixed Ratio Drive Unit
Compact fixed ratio drive unit for paper roll winders, maintaining constant tension-speed relationship during high-speed paper reeling operations. Planetary gear design offers high efficiency for paper machine tail-end processes. Classifies under HTS 8483.40.30.40 when destined for paper production winders.