8483.90.00 30 Transmission shafts (including cam shafts and crank shafts) and cranks; bearing housings 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). - Toothed wheels, chain sprockets and other transmission elements presented separately; parts - Of gears and gearing, gear boxes and other speed changers - Free AUT, NZT,