“In a machine, a shaft is a rod that turns around continually in order to transfer movement in the machine.”
“An axle is a rod connecting a pair of wheels on a car or other vehicle.”
“Parts suitable for use solely or principally with the machinery of headings 8425 to 8430 It is agreed that the machinery for which the goods are solely or principally suitable for use fall within headings 8429 or 8430. ” or (as HMRC contend) under heading 8483 (with a 3.4% duty rate): “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)”
“Bearing housings, not incorporating ball or roller bearings; plain shaft bearings/Other.”