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A rack and pinion has roughly the same purpose as a worm gear with a rack replacing the gear, in that both convert torque to linear force. However the rack and pinion generally provides higher linear speed — since a full turn of the pinion displaces the rack by an amount equal to the pinion's pitch circle whereas a full rotation of the worm screw only displaces the rack by one tooth width.
In many cases, such as remote controlled toys, the pinion is also the drive gear for a reduction in speed, since electric motors operate at higher speed and lower torque than desirable at the wheels. However the reverse is true in watches, where gear trains commence with a high-torque, low-speed spring and terminate in the fast-and-weak escapement.
The Pilatus Railway is the steepest rack railway in the world, with a maximum gradient of 48% and an average gradient of 35%. Functioning of the rack and pinion on the Strub system. A rack railway (also rack-and-pinion railway, cog railway, or cogwheel railway) is a steep grade railway with a toothed rack rail, usually between the running rails.
A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage.. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. [2]
The rack-and-pinion steering system does not work with solid front suspension so a change was made to use independent front suspension. The extensive, ground-up redesign allowed engineers to incorporate more lightweight materials such as high-strength and ultra-high-strength steels and aluminums.
The rear diff on the 1st series Vitara was colloquially-known as "the Japanese 9-inch" as it was a very strong diff and hard to damage, even with oversized tyres. The front diffs were less strong, those with the aluminium-cased housing the weakest. The front diff with steel housing was not as widely available but is sought after by modifiers.
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