Worm drive
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A worm drive is a gear arrangement in which a worm meshes with a worm wheel. Its main purpose is to translate the motion of two perpendicular axes or to translate circular motion to linear motion.The
Worm and worm wheel
A double bass features worm gears as tuning mechanisms
A worm gear cotton gin from Assam
A worm drive controlling a gate. The position of the gate does not change, once set
Quattro is the trademark used by the automotive brand Audi to indicate that all-wheel drive technologies or systems are used on specific models of its automobiles.
"quattro" logo badge on the grille of an Audi car
The original quattro centre differential (1980)
Audi quattro Torsen centre differential
Audi quattro Crown Gear centre differential