Rack
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A rack is a mechanical part that is used for transmission in conjunction with a gear. Divided into straight rack and helical rack, respectively paired with straight cylindrical gear and helical cylindrical gear, rack and pinion transmission is the transmission method of gear and rack matching. When the gear is active, it can turn the rotary motion into a linear motion; When the rack is active, the linear motion can be changed into rotary motion, and the rack and pinion transmission can be applied to the fields of elevators, track systems, automotive steering systems, machine tools and actuator feed mechanisms.