pinion and crown wheel

Synonyms:

bevel gear, pinion and ring gear

Types:

differential, differential gear

a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves

Type of:

cogwheel, gear, gear wheel, geared wheel

a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion