In addition to traditional rectangular sealing rings, which seal on the outer surface, there are some applications where the seal is applied to the inner diameter. These rectangular sealing rings (REDI) are used when a groove cannot be inserted into the shaft due to cross-bores in the shaft or the cross-sections are too small.

Due to the special material surface combination and KKI's tried-and-tested REDI design, both leakage and frictional torque can be significantly reduced compared to conventional solutions from iron castings. An expansion by centrifugal forces is effectively prevented by special geometries and materials.

Due to the numerous rotating components in the drive train, they have to be separated from one another, not only to reduce frictional torque but also to prevent the wear of two elements.

The KKI axial discs reliably separate two rotating elements. These discs are installed as a flying disc, since in these applications no space is available for anti-rotation devices. In order to reduce the resulting frictional torques, the disks are equipped with a special material-surface combination. This technology also delivers higher durability under extreme stress conditions compared to bronze discs, for example. The use of TriboKon can be used to cover different wall thicknesses and applications. Through the use of polymeric materials and reduced wall thicknesses, considerable weight reduction and space savings can be achieved.

Applications with difficult assembly procedures (e.g. blind mounting in large gears) require a consistent mounting diameter. Otherwise, damage to the rectangular sealing ring (REDI) cannot be excluded, leading to costly replacements. Typically, cast iron sealing rings are used here, which lead to material-specific disadvantages during assembly and use.

With the HOOK method developed by KKI, the REDI is assembled as usual and hooks itself to a defined diameter. This technology can be implemented in almost all materials, dimensions and variants. In contrast to cast iron rings, mounting is carried out within the groove. The REDI therefore lies cleanly inside the groove during the assembly of surrounding components, ensuring easy, error-free installation. What's more, a reduced lead-in chamfer is required as the HOOK technology almost completely compensates the expansion.

Three trends currently determine the rectangular sealing ring (REDI) market. Firstly, stricter exhaust gas regulations demand a noticeable reduction in frictional torque and leakage losses in commercially available REDI materials. Secondly, the technologies required for this purpose should only have minimal effects, or the material selection should generally be customized to the application. Thirdly, due to increasingly complex transmissions, error-free assembly is crucial.

With the EVO-REDI, KKI has proved that these challenges can be met. The EVO-REDI reduces friction and leakage to a minimum. The leakage can therefore be used where it is most effective. What's more, the special design of EVO-REDI facilitates error-free assembly. These modifications do not affect the available installation space, which is why the customer does not need to adapt the surrounding components, and existing sealing rings can be replaced 1:1. Through the use of TriboKon polymers further commercial potential savings can be achieved.

The development of a new bearing element for the different requirements such as high speeds, extreme robustness and smooth running. A bearing type that is frequently used in the new E- mobility applications.

The solution is our new machine element called "Hydrodynamic 3D-Plain Bearing". The new "Hydrodynamic 3D-Plain Bearing" withstands bearing loads that are absorbed by axial needle bearings, thrust washers or plain bearings.