Function

Dry joints should transfer torque at a reasonable production price and without servicing expenditure with a small diffraction angle and length offset. It also limits the bearing strain in case of offsets. Moreover, torque variations and vibrations are damped.

How it works

The usage of dry joints in the drive train decreases. Only for the standard drive (engine in front and rear drive) it is positioned in the immediate vicinity of the gearbox at the cardan shaft. Because all dry joints contain artificial rubber, they have an vibration-damping and noise-damping effect. The cardan shaft leads to the centre bearing and/or to a differential gear fastened to the body, the diffraction angle remains small. Only about 5° and a maximum of 10 mm of length correction are possible. The polygon-elastic joint (for oldtimer) rubber is pre-stretched by a metal tape, and vulcanised between two sheet steel flanges. The Hardy disc joint features a package of nylon and rubber, connecting single steel tins. The silent bloc joint makes use of artificial rubber which is pressed in between steel tins and a two-part metal tread. 09/08

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