Tariff monitor · Machinery & Equipment

Gears and power transmission: statutory & effective tariff rates

Statutory HTS duty rates for 24 gears and power transmission tariff lines (MFN Free–5.7% (+1 see schedule)), from USITC. Effective rate May 2026: 16.85%; monthly his

Statutory rates from the schedule

  • Shafts, gearboxes, gears, pulleys, and couplings — mechanical drivetrain components. This family covers HTS heading 8483: 24 eight-digit rate lines with MFN (column 1, general) rates of Free–5.7% (+1 see schedule) in the 2026 schedule.
  • 1 line carries compound or specific duties that cannot be stated as a single percentage; this page flags them "see schedule" rather than approximating.
  • Chapter 99 flags on individual lines mark Section 301/232 overlay provisions (e.g. 9903.88.03) that apply on top of the MFN column.

What importers actually paid

  • Latest month on record (2026-05): 16.85% effective on $904.2M of imports, versus 15.42% in the same month a year earlier. The monthly archive holds 149 observations from 2014-01 through 2026-05.
  • In 2025, U.S. imports for consumption in this family totaled $10.8B in customs value and paid $1.8B in calculated duties: an effective tariff rate of 16.8%. The effective rate captures Section 301/232 overlays, exclusions, and special-program use that the statutory column cannot.
  • A year earlier the effective rate was 4.72%, so the duty burden rose 12.1 points.
  • Top source countries in 2025: Germany ($1.4B at 14.71%), China ($1.3B at 50.96%), India ($1.2B at 17.31%), Japan ($1.1B at 14.22%), Mexico ($1.1B at 8.1%).

Representative rate lines

  • 8483.10.10: Designed for use solely or principally with spark-ignition internal combustion piston engi — MFN 2.5%
  • 8483.10.30: Other — MFN 2.5%
  • 8483.10.50.00: Other transmission shafts and cranks — MFN Free
  • 8483.20.40: Flange, take-up, cartridge and hanger units — MFN 4.5%
  • 8483.20.80: Other — MFN 4.5%
  • 8483.30.40: Flange, take-up, cartridge and hanger units — MFN 4.5%
  • 8483.30.80: Other — MFN 4.5%
  • 8483.40.10.00: Torque converters — MFN Free

About this data

  • Reference statistics derived from USITC published data. Not a customs ruling; verify rates with a licensed customs broker before relying on them.

Last reviewed 2026-05-12.