Racks are portions of a cylindrical disk with an infinite radius which has involute shaped tooth cut into its encounter. Racks mate exclusively with spur gears which have the same module, pressure angle and preferably encounter width. KHK offers equipment racks in many materials, configurations, modules and lengths. One unique feature of our racks can be that most are supplied with finished ends. This kind of production Metric Gear Rack allows for multiple racks to be butted, end-to-end, to create one continuous length of rack. Many of the products that people offer allow for secondary functions 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 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 apparatus shafts, it is one of the parallel shaft category. The spur gear that meshes with a equipment rack is generally called a pinion.
Besides gear racks with straight range tooth, there are helical racks that have slanted teeth. Helical gear racks are paired with helical gears, but due to the slant of the tooth path, as in helical gears, the mesh generates axial thrust forces.
Among the apparatus racks’ primary applications are machine equipment and transport devices and when the applications involve transmitting linear motions, they are generally compared with ball screws. In those instances, 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 duration limitation by connecting equipment racks with completed ends. However, an example of the disadvantages of equipment racks includes the occurrence of backlash.
When manufacturing gear racks, because of their bar form, bending often outcomes. In such cases, corrective procedures using presses are often employed.
