Racks are portions of a cylindrical disk with an infinite radius which has involute shaped teeth cut into its encounter. Racks mate exclusively with spur gears which have the same module, pressure position and preferably face width. KHK offers equipment racks in many materials, configurations, modules and lengths. One unique feature of our racks is certainly that most are supplied with finished ends. This kind of production permits multiple racks to end up being butted, end-to-end, to create one continuous length of rack. Most of the products that we offer allow for secondary functions such as reduction of the space, 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 for which the radius of the pitch cylinder is infinite and in a bar form is Metric Gear Rack called a gear rack. If it is sorted by the positions of the apparatus shafts, it belongs to the parallel shaft category. The spur gear that meshes with a gear rack is normally called a pinion.
Besides gear racks with straight range 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 direction, as in helical gears, the mesh produces axial thrust forces.
Among the gear racks’ main applications are machine tools and transport devices and when the applications involve transmitting linear motions, they are often compared with ball screws. In those instances, the main benefits of gear racks could be named this kind of as having the ability to meet a heavier load by using bigger modules and having no size limitation by connecting equipment racks with completed ends. On the other hand, a good example of the disadvantages of equipment racks includes the occurrence of backlash.
When manufacturing equipment racks, because of their bar shape, bending often results. In these cases, corrective procedures using presses tend to be employed.