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![]() ![]() With this mechanism, the pinion, mounted to the steering shaft, is meshed with a steering rack to transmit rotary motion laterlly (converting it to linear motion) so that you can control the wheel. The characteristics of rack and pinion systems in steering are as follows: simple structure, high rigidity, small and lightweight, and excellent responsiveness. On the other hand, they are also used in steering systems to change the direction of cars. Rack and pinions are used for lifting mechanisms (vertical movement), horizontal movement, positioning mechanisms, stoppers and to permit the synchronous rotation of several shafts in general industrial machinery. The advantages of a ball screw are the high precision and lower backlash while its shortcomings include the limit in length due to deflection. The advantages of a gear rack are its mechanical simplicity, large load carrying capacity, and no limit to the length, etc. There are pros and cons for using racks in place of ball screws. The former is used widely in conveying systems while the latter can be used in extrusion systems and lifting/lowering applications.Īs a mechanical element to transfer rotary into linear motion, gear racks are often compared to ball screws. There are applications where the gear rack is stationary, while the pinion traverses and others where the pinion rotates on a fixed axis while the gear rack moves. We can control this with special presses & remedial processes. When a gear rack is produced, the tooth cutting process and the heat treatment process can cause it to try & go out of true. These are described as “gear racks with machined ends”. If the application requires a long length requiring multiple gear racks in series, we have racks with the tooth forms correctly configured at the ends. To provide many variations of rack and pinion, KHK has many types of gear racks in stock. ![]() For example, as shown in the picture, a gear is used with the gear rack to rotate a parallel shaft. Generally, gear rack and pinion are collectively called “rack and pinion”. A gear rack has straight teeth cut into one surface of a square or round section of rod and operates with a pinion, which is a small cylindrical gear meshing with the gear rack. ![]() ![]() Gear racks are utilized to convert rotating movement into linear motion. ![]()
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