A rack and pinion is a type of linear actuator that comprises a pair of gears which convert rotational motion into linear motion. A circular gear called `the pinion` engages teeth on a linear `gear` bar called `the rack`; rotational motion applied to the pinion causes the rack to move, thereby translating the rotational motion of the pinion ...
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http://en.wikipedia.org/wiki/Rack_and_pinion
mechanical device consisting of a bar of rectangular cross section (the rack), having teeth on one side that mesh with teeth on a small gear (the ... [1 related articles]
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http://www.britannica.com/eb/a-z/r/2
A steering mechanism that consists of a gear in mesh with a toothed bar, called a "rack." The ends of the rack are linked to the steered wheels with tie rods. When the gear is rotated by the steering shaft, it moves the rack from side to side: turning the wheels.
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http://www.caranddriver.com/reviews/glossary-of-terms-info
In machinery, a rack is a straight or slightly curved bar; with teeth on one of its edges. Adapted to work into the teeth of a wheeled cog (a pinion), for the purpose of converting a circular motion into a rectilinear motion or vice versa.
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http://www.probertencyclopaedia.com/browse/GR.HTM
[
n] - a wheel gear (the pinion) meshes with a toothed rack
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http://www.webdictionary.co.uk/definition.php?query=rack%20and%20pinion
noun a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)
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https://www.encyclo.co.uk/local/20974
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