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 pinion). If the pinion rotates about a fixed axis, the rack will move in a straight path. Some automobile steering mechanisms have rack-and-pinion drives that use this principle. If the rack is fixed and the pinion is carried in bearings on a table guided on tracks parallel to the rack, rotation of the pinion shaft will move the table parallel to the rack. On machine tools, this principle is used to obtain rapid movements of worktables.
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A pinion is usually the smallest gear in a gear drive train. In many cases, such as remote controlled toys, the pinion is also the drive gear. In the case of John Blenkinsop's The Salamanca the pinion was rather large.
2. in the case of radio controlled cars with an engine (i.e. nitro) this pinion gear can be referred to as a "Clutch bell"
Separating Rack and Pinion Myths from Reality; Rack and Pinion Drives Are an Age-Old Mechanism Widely Used for Converting Rotary Motion into Linear Motion. However, Myths and Misconceptions Abound regarding the Use and Application of Rack and Pinions in This Age of Servo-Driven Machinery. Here, We Debunk Some of Those Fallacies
Nov 01, 2011; Byline: John Entwistle Atlanta Drive Systems Inc. Farmingdale, N.J. Myth: Rack and pinions are old technology that only...
Lubricating Rack-and-Pinion Sets for Long Life; in Everything from Food Processing to Construction, Steel Rack-and-Pinion Sets Provide Reliable and Accurate Linear Motion - and Always Require Proper Lubrication
Mar 01, 2012; Byline: Mike Anselmo Manager of application engineering Wittenstein Inc. Bartlett, Ill. Effective lubrication is essential to...