8483Transmission 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:
8483.40Gears 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:
8483.40.30Imported for use with machines for making cellulosic pulp, paper or paperboard