Parts of gearing, gear boxes and other 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: > Toothed wheels, chain sprockets and other transmission elements presented separately; parts: > Parts of gearing, gear boxes and other 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 9903.88.13, 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)
Subheadings
Products classified under HTS 8483.90.50
Helical Gearbox Input Shaft
This precision-machined steel input shaft transmits rotational power into a helical gearbox, featuring splines for secure meshing with the primary gear. It is classified under HTS 8483.90.50 as a dedicated part of gearing and gearboxes, essential for speed reduction in industrial machinery. Designed for high-torque applications in manufacturing equipment.
Spiral Bevel Gearbox Thrust Bearing Spacer
Precision-ground spacer maintains axial clearances in spiral bevel gearbox thrust bearing arrangements, preventing gear tooth overload. HTS 8483.90.50 part for heavy-duty speed changers in marine winches. Material-matched to housing expansion rates.
Planetary Gearbox Carrier Plate
A forged aluminum carrier plate holds planet gears within a planetary gearbox, enabling multi-stage speed reduction and torque multiplication. Classified under HTS 8483.90.50 as a core internal part of gear boxes and speed changers used in robotics and automation. Precision holes ensure proper gear meshing and load distribution.
Worm Gearbox Bronze Worm Wheel
This phosphor bronze worm wheel meshes with a worm screw in a worm gearbox to achieve high-ratio speed reduction with self-locking capability. It qualifies under HTS 8483.90.50 as a part of gearing and other speed changers for conveyor and hoist systems. High wear resistance suits heavy-duty industrial use.
Cycloidal Speed Reducer Housing
Cast iron housing encases eccentric discs and pins in a cycloidal speed reducer, providing structural integrity for high-shock load applications. Classified as HTS 8483.90.50 parts of gear boxes and speed changers in packaging machinery. Integral mounting flanges ensure alignment.
Torque Converter Stator Assembly
Multi-bladed stator redirects fluid flow in automatic transmission torque converters to multiply engine torque during acceleration. Falls under HTS 8483.90.50 as parts of speed changers including torque converters for automotive and industrial applications. Precision vanes optimize hydraulic efficiency.
Inline Helical Gearbox Output Flange
Machined steel output flange couples inline helical gearboxes to driven equipment, featuring precise bolt patterns and centering diameters. HTS 8483.90.50 classification applies to this gearbox mounting part for conveyor drives. Balanced design minimizes vibration.
Bevel Gearbox Bevel Pinion
Hardened alloy steel bevel pinion gear transmits motion at 90-degree angles in right-angle bevel gearboxes for mixers and elevators. Classified HTS 8483.90.50 as gearing parts despite separate presentation. Spiral teeth reduce noise and improve load capacity.
Variable Speed Drive Gear Cluster
Pre-assembled cluster of change gears for mechanical variable speed drives, enabling step-less ratio adjustment in machine tools. HTS 8483.90.50 covers this gearbox internal gearing assembly. Hardened teeth ensure durability under sliding contact.
Multi-Stage Gearbox Intermediate Shaft
Supported by multiple bearings, this intermediate shaft carries gear pairs between input and output stages in multi-stage industrial gearboxes. Precision ground journals and keyways ensure alignment under HTS 8483.90.50. Balances speed and torque across stages.
Harmonic Drive Wave Generator
Cam-shaped wave generator flexes the harmonic drive flexspline for ultra-precise speed reduction ratios up to 160:1 in robotics. Novel classification under HTS 8483.90.50 as speed changer gearing part despite unique principle. Thin-walled bearing race optimizes deformation.
Cone Drive Gearbox Oil Pump Gear
Internal/external gear pair lubricates cone drive gearboxes by pumping oil through internal passages during operation. Integral HTS 8483.90.50 part despite pumping function due to speed changer primacy. Ensures bearing and gear splash lubrication.
Precision Right Angle Gearbox Idler Gear
Anti-backlash idler gear maintains constant mesh in precision right-angle gearboxes for CNC coordinate tables. Ground teeth minimize transmission error under HTS 8483.90.50. Dual-purpose positioning and speed changing.
Inline Gearmotor Pinion Shaft
Integral pinion shaft directly mounts to motor shaft in inline gearmotors, eliminating couplings for compact automation. Combined shaft/pinion qualifies as HTS 8483.90.50 gearbox input part. Splined output mates with first reduction gear.
Differential Gearbox Side Gear
Helical side gear in automotive/industrial differentials distributes torque between axles, allowing speed differentiation during turns. HTS 8483.90.50 classification for this speed changer gearing despite vehicle use. Thrust washers integral to design.