Manual Multi-Speed Gearbox
A variable ratio gearbox with multiple manually selectable speeds for machine tools and agricultural equipment. Classified in HTS 8483.40.50 due to hand-lever operation for ratio changes without electronic controls. Provides precise speed control for drilling, milling, and tractor PTO drives.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If functioning as clutch mechanism
Clutches and shaft couplings have separate provisions even when combined with speed changing function.
If integral to parts washing machinery
Speed changers permanently attached to specific machines classified as parts thereof.
If shipped as camshaft/crankshaft only
Transmission shafts entered unassembled from gearing components classified separately.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Document maximum input/output speeds and number of ratios to distinguish from automatic transmissions (8483.40.30)
• Include lubrication specifications and mounting flange dimensions for proper identification
• Ensure declaration excludes electronic controls to avoid reclassification to Chapter 85
Related Products under HTS 8483.40.50
Agricultural Tractor PTO Speed Changer
Manual multi-speed PTO gearbox for tractors allowing operator selection of 540/1000 RPM ratios. HTS 8483.40.50 covers fixed ratio speed changers with hand lever operation. Essential for matching implement speed requirements.
Benchtop Belt Drive Speed Changer
Tabletop variable speed changer with stepped pulleys and belt tension lever for small workshop tools. Classified HTS 8483.40.50 as manually adjustable ratio device. Used for drill presses, band saws, and grinders.
Wafer Grinder Spindle Speed Changer
Manual multi-speed gearbox for semiconductor wafer grinding equipment spindle drive. Allows precise RPM selection for different grind/lap/polish stages. HTS 8483.40.50 as manually operated speed changer.
Wind Tunnel Drive Gearbox
Variable ratio speed changer with handwheel ratio selector for wind tunnel fan test drives. HTS 8483.40.50 covers manual operation for aerodynamic testing. Provides precise airflow speed control.
Test Stand Engine Dynamometer Gearbox
Fixed ratio speed matching gearbox for engine test stands with manual ratio selection. HTS 8483.40.50 for laboratory engine performance testing applications. Matches engine RPM to dyno absorber speeds.
Laboratory Centrifuge Speed Changer
Manual pulley speed changer for research centrifuges with belt position selector. HTS 8483.40.50 as hand-operated variable ratio device for lab use. Provides precise rotor speed control.