Special high-speed test rigs are used to test bearings. In these tests, the effects of different lubricants on the sliding properties of the bearings are checked in an endurance test.

The design of such a test rig must meet different requirements. The drive is subject to special conditions. In addition to a bearing that is free of lateral forces, the coupling is a component that should not be underestimated. In this case, the key properties are absolute torsional stiffness, good damping properties and, of course, precise and virtually force-free compensation of all misalignments between the shaft ends.


Torsionally rigid flexible couplings are generally best suited for such applications. The thin metal bellows have vibration-damping properties as well as compensating properties. The high flexibility of Jakob's KSS couplings with their 2-corrugated bellows and straight intermediate piece and the ease with which the coupling can be installed thanks to the use of conical bushes as a shaft-hub connection guarantee reliable transmission of all forces and torques, even with small shaft diameters and without an additional feather key. The rotationally symmetrical design ensures excellent, dynamic operating behavior, even at very high speeds. The high torsional stiffness and the very low restoring forces in the event of shaft misalignment as well as the low moment of inertia characterize the coupling type. Torques from 25 to 2600 Nm are possible. The highest quality of workmanship and the materials used make KSS couplings a reliable and economical component.

In addition to test benches, for example, they are also often used in servo and actuator drives.