spur gear rack

Rack and pinions are used for lifting mechanisms (vertical movement), horizontal motion, positioning mechanisms, stoppers and to let the synchronous rotation of many shafts generally industrial machinery. However, also, they are used in steering systems to improve the direction of vehicles. The features of rack and Spur Gear Rack pinion systems in steering are as follows: simple framework, high rigidity, little and lightweight, and exceptional responsiveness. With this mechanism, the pinion, installed to the steering shaft, is certainly meshed with a steering rack to transmit rotary movement laterlly (transforming it to linear motion) so that you can control the wheel. In addition, rack and pinions are used for several other purposes, such as toys and lateral slide gates.

As a mechanical element to transfer rotary into linear motion, gear racks are often in comparison to ball screws. There are advantages and disadvantages for using racks in place of ball screws. The advantages of a gear rack are its mechanical simplicity, huge load carrying capacity, no limit to the length, etc. One disadvantage though may be the backlash. The benefits of a ball screw are the high precision and lower backlash while its shortcomings include the limit in length due to deflection.

There are applications where in fact the gear rack is stationary, while the pinion traverses and others where in fact the pinion rotates upon a fixed axis as the gear rack moves. The previous is used widely in conveying systems while the latter can be used in extrusion systems and lifting/lowering applications.

To provide many variations of rack and pinion, KHK has various kinds of equipment racks in stock. If the application requires a long length requiring multiple equipment racks in series, we’ve racks with the tooth forms properly configured at the ends. They are described as “equipment racks with machined ends”. Whenever a equipment rack is created, the tooth cutting process and heat treatment process could cause it to try & walk out true. We are able to control this with particular presses & remedial processes.