Racks are portions of a cylindrical disk with an infinite radius which includes involute shaped tooth cut into its encounter. Racks mate exclusively with spur gears which have the same module, pressure Metric Gear Rack position and preferably encounter width. KHK offers gear racks in many components, configurations, modules and lengths. One exclusive feature of our racks is that most are given finished ends. This type of production permits multiple racks to become butted, end-to-end, to create one continuous amount of rack. Many of the products that we offer allow for secondary functions such as reduction of the length, the adding of tapped holes, or the use of heat therapy. Our offering also contains products which 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 called a gear rack. If it’s sorted by the positions of the gear 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 tooth, there are helical racks which have slanted tooth. Helical equipment racks are paired with helical gears, but because of the slant of the tooth direction, as in helical gears, the mesh generates axial thrust forces.
Among the apparatus racks’ main applications are machine equipment and transport devices so when the applications involve transmitting linear motions, they are often weighed against ball screws. In those cases, the main advantages of gear racks can be named this kind of as being able to meet a heavier load by using bigger modules and having no size limitation by connecting equipment racks with finished ends. However, a good example of the disadvantages of equipment racks contains the occurrence of backlash.
When manufacturing equipment racks, because of their bar shape, bending often outcomes. In such cases, corrective procedures using presses tend to be employed.