Racks are portions of a cylindrical disk with an infinite radius which includes involute shaped teeth cut into its face. Racks mate exclusively with spur gears that have the same module, pressure position and preferably face width. KHK offers gear racks in many components, configurations, Metric Gear Rack modules and lengths. One exclusive feature of our racks is usually that most are given finished ends. This type of production permits multiple racks to end up being butted, end-to-end, to create one continuous amount of rack. Most of the products that people offer enable secondary functions such as reduction of the distance, the adding of tapped holes, or the use of heat treatment. Our offering also contains products that have already had a few of these secondary operations completed.
The straight tooth cylindrical gear for which the radius of the pitch cylinder is infinite and in a bar form is named a gear rack. If it is sorted by the positions of the gear shafts, it is one of the parallel shaft category. The spur equipment that meshes with a gear rack is generally called a pinion.
Besides equipment racks with straight series teeth, there are helical racks that have slanted tooth. Helical equipment racks are paired with helical gears, but because of the slant of the tooth path, as in helical gears, the mesh creates axial thrust forces.
Among the gear racks’ main applications are machine equipment and transport devices and when the applications involve transmitting linear motions, they are often weighed against ball screws. In those cases, the main benefits of gear racks can be named this kind of as being able to fulfill a heavier load 
through the use of bigger modules and having no length limitation by connecting equipment racks with finished ends. However, an example of the disadvantages of gear racks includes the occurrence of backlash.
When manufacturing gear racks, because of their bar form, bending often results. In these cases, corrective processes using presses are often employed.