Worm Gear Reducer
Worm wheel and screw gear combination providing high reduction ratios and self-locking capability for conveyor drives and winches. HTS 8483.40.90.00 covers this orthogonal gearing system excluded from toothed wheel or sprocket categories. Typically bronze worm wheel mated with hardened steel worm.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing clutches or shaft couplings
Gearing with integrated clutch mechanisms classified under 8483.60 for combined functions.
If for semiconductor wafer slicing saws
Precision gearing dedicated to wafer preparation equipment follows Chapter 84 semiconductor notes.
If simple cast iron gearing without precision machining
Non-precision gearing may fall under general steel articles if lacking transmission characteristics.
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Import Tips & Compliance
• Specify worm lead, wheel teeth count, and center distance in documentation to confirm 'other gearing' status
• Include efficiency ratings (>70% typical) and load capacity to support industrial application claims
• Watch for reclassification if imported with mounting base as complete speed changer
Related Products under HTS 8483.40.90.00
Helical Gear Set for Industrial Machinery
A precision-engineered set of helical gears designed for transmitting motion and torque in heavy industrial machinery such as conveyors and mixers. Classified under HTS 8483.40.90.00 as gearing other than toothed wheels or sprockets, due to its helical tooth configuration for smooth power transmission. Excludes simple toothed wheels entered separately.
Planetary Gearbox Assembly
Compact planetary gear system consisting of sun gear, planet gears, and ring gear for high-torque, low-speed applications in robotics and automation. Falls under HTS 8483.40.90.00 as complex gearing beyond simple toothed wheels or sprockets. Provides gear reduction ratios up to 100:1 in integrated housing.
Bevel Gear Pair for Right-Angle Drive
Miter or spiral bevel gears transmitting power at 90-degree angles in differential assemblies and machine tools. Classified HTS 8483.40.90.00 as specialized gearing distinct from straight toothed wheels. Provides smooth torque transfer with minimal backlash.
Rack and Pinion Gear Set
Linear motion conversion system with circular pinion gear engaging straight rack for CNC machines and steering systems. HTS 8483.40.90.00 captures this linear gearing excluded from toothed wheel specifics. Precision ground for minimal backlash in automation.
Spur Gear Cluster for Multi-Stage Reduction
Multiple integral spur gears of varying diameters on single shaft for sequential speed reduction in pumps and compressors. Falls under HTS 8483.40.90.00 as compound gearing beyond single toothed wheels. Provides stepped ratios in compact form factor.
Hypoid Gear Set for Heavy Duty Applications
Offset axis hypoid gears providing superior strength for axle drives and heavy machinery differentials. HTS 8483.40.90.00 includes this advanced gearing type excluded from basic toothed wheel definitions. Features curved teeth for quiet operation and high loads.