Racks are portions of a cylindrical disk with an infinite radius which includes involute shaped teeth cut into its encounter. Racks mate solely with spur gears which have the same module, pressure position and preferably face width. KHK offers Metric Gear Rack 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 allows for multiple racks to become butted, end-to-end, to create one continuous amount of rack. Many 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 treatment. Our offering also includes products that 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 named a gear rack. If it is sorted by the positions of the gear shafts, it belongs to the parallel shaft category. The spur gear that meshes with a gear rack is generally called a pinion.
Besides gear racks with straight collection the 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 path, 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 weighed against ball screws. In those instances, the main advantages of gear racks could be named this kind of as being able to satisfy a heavier load through the use of larger modules and having no size limitation by connecting equipment racks with finished ends. However, a good example of the disadvantages of gear racks contains the occurrence of backlash.
When manufacturing gear racks, due to their bar shape, bending often results. In these cases, corrective processes using presses are often employed.