**Rack and Pinion**
**Definition**
A rack and pinion is a mechanical device that converts rotational motion into linear motion. It consists of a circular gear called the pinion engaging with a linear gear bar known as the rack.
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## Overview
The rack and pinion mechanism is widely used in various applications requiring precise linear movement. The pinion, a small round gear, meshes with the teeth on the rack, which is a flat, toothed component. When the pinion rotates, it moves the rack in a straight line, enabling controlled linear displacement.
## Applications
Rack and pinion systems are commonly found in steering mechanisms of automobiles, where they translate the rotational motion of the steering wheel into the lateral movement of the wheels. They are also used in machine tools, railways, and automation equipment for accurate positioning.
## Advantages
This mechanism offers simplicity, reliability, and efficient transmission of motion. It provides a direct and compact means of converting rotary motion to linear motion without the need for complex linkages.
## Limitations
While effective for many uses, rack and pinion systems can experience wear over time due to continuous meshing of teeth, requiring maintenance or replacement in high-load or high-speed applications.
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**Meta Description:**
A rack and pinion is a mechanical system that converts rotational motion into linear motion, commonly used in steering and machinery for precise movement.