Racks are portions of a cylindrical disk with an infinite radius which includes involute shaped the teeth cut into its encounter. Racks mate specifically with spur gears which have the same module, pressure position and preferably face width. KHK offers gear racks in many materials, configurations, modules and lengths. One exclusive feature of our racks can be that most are given finished ends. This kind of production allows for multiple racks to become butted, end-to-end, to produce one continuous amount of rack. Most of the products that people offer allow for secondary procedures such as for example reduction of the distance, the 
adding of tapped holes, or the application of heat therapy. Our offering also contains products that have already had some of these secondary operations completed.
The straight tooth cylindrical gear that the radius of the pitch cylinder is infinite and in a bar form is called a gear rack. If it is sorted by the positions of the apparatus shafts, it belongs to the parallel shaft category. The spur equipment that meshes with a gear rack is generally called a pinion.
Besides gear racks with straight series teeth, there are helical racks which have slanted tooth. Helical gear racks are paired with helical gears, but due to the slant of the tooth Metric Gear Rack direction, as in helical gears, the mesh produces axial thrust forces.
Among the apparatus racks’ main applications are machine tools and transport devices so when the applications involve transmitting linear motions, they are often compared with ball screws. In those cases, the main advantages of gear racks could be named this kind of as being able to meet a heavier load by using larger modules and having no duration limitation by connecting gear racks with completed ends. However, an example of the disadvantages of gear racks contains the occurrence of backlash.
When manufacturing gear racks, because of their bar form, bending often results. In these cases, corrective processes using presses tend to be employed.