Racks are portions of a cylindrical disk with an infinite radius which has involute shaped tooth cut into its encounter. Racks mate specifically with spur gears which have the same module, pressure angle and preferably encounter width. KHK offers gear racks in many materials, configurations, modules and lengths. One unique Metric Gear Rack feature of our racks is definitely that most are given finished ends. This kind of production permits multiple racks to end up being butted, end-to-end, to create one continuous amount of rack. Many of the products that we offer allow for secondary functions such as for example reduction of the length, the adding of tapped holes, or 
the use of heat treatment. Our offering also contains products which have already had a few 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 gear shafts, it is one of the parallel shaft category. The spur equipment that meshes with a equipment rack is generally called a pinion.
Besides equipment racks with straight series the teeth, there are helical racks that have slanted teeth. Helical equipment racks are paired with helical gears, but due to the slant of the tooth path, as in helical gears, the mesh produces 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 compared with ball screws. In those situations, the main advantages of gear racks could be named this kind of as being able to meet a heavier load through the use of larger modules and having no length limitation by connecting equipment racks with completed ends. On the other hand, an example of the disadvantages of gear racks includes the occurrence of backlash.
When manufacturing gear racks, due to their bar form, bending often results. In these cases, corrective processes using presses are often employed.