Harmonized Tariff Schedule of the U.S. › Chapter 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
8483.40.50.20Tariff line
Classification path
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
8483
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
Other
Gear boxes and speed changers for wind turbines, as described in statistical note 9 to this chapter
8483.40.50.20
Rates of duty
General rate (Column 1)2.5%
SpecialFree (A*, AU, BH, C, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Column 227.5%
UnitNo.
Free (A*, AU, BH, C, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Printed page 2858
Measure flags
for origin CN, entry date 2026-10-26 · base rate 2.5%
- Section 301 forced-labor tariff (12.5%)9903.05.31Conditional+12.5%China: Column 1 rate + 12.5% additional
- China 301 List 3 (9903.88.03)9903.88.03Applies+25%8-digit subheading 8483.40.50 is on L3
- 232 steel / aluminum / copper & derivatives9903.82.09Conditional+25%General (all other countries) | Gear boxes and speed changers for wind turbines as described in statistical note 6 to chapter 84 of the HTSUS
Confirmed total 27.5% · max 52.5%Full duty breakdown →