Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 83 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 Commodity Code Description 84 83 10 Transmission shafts (incl. cam shafts and crank shafts) and cranks 84 83 20 Bearing housings, incorporating ball or roller bearings 84 83 30 Bearing housings, not incorporating ball or roller bearing;plain shaft bearing 84 83 40 Gears and gearing;other than toothed wheels,chain sprockets and other transmission..; 84 83 50 Flywheels and pulleys including pulley blocks 84 83 60 Clutches and shaft couplings (including universal joints) 84 83 90 Toothed wheels, chains sprockets and other transmission elements presented seperately;