Racks are portions of a cylindrical disk with an infinite radius which has involute shaped the teeth cut into its face. Racks mate specifically 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 exclusive feature of our racks can be that most are given finished ends. This kind of production allows for multiple racks to become butted, end-to-end, to create one continuous amount of rack. Most of the products that we offer allow for secondary functions such as for example reduction of the space, the adding of tapped holes, or the use of heat therapy. Our offering also includes 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 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 equipment rack is generally called a pinion.
Besides equipment racks with straight series the teeth, there are helical racks which have slanted the teeth. Helical gear racks are paired with helical gears, but due to the slant of the tooth direction, as in helical gears, the mesh generates axial thrust forces.
Among the gear racks’ primary applications are machine tools and transport devices so when the applications involve transmitting linear motions, they are generally compared with ball screws. In those cases, the main benefits of gear racks can be named such as having the ability to fulfill a قفسه دنده متریک heavier load by using larger modules and having no duration 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 equipment racks, due to their bar form, bending often outcomes. In such cases, corrective processes using presses tend to be employed.