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; partsthereof 84 83 TRANSMISSION SHAFTS AND CRANKS; BEARING HOUSINGS; GEARS...; FLYWHEELS... Commodity Code Description 84 83 10 Transmission shafts (including 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 bearings; plain shaft bearing 84 83 40 Gears and gearing, other than toothed wheels, chain sprockets and other transmis 84 83 50 Flywheels and pulleys, including pulley blocks: 84 83 60 Clutches and shaft couplings (including universal joints): 84 83 90 Toothed wheels, chain sprockets and other transmission elements presented separa