The motor rotating shaft is horizontal, the drive pinion spin axis is also horizontal. The problem is that these axes are not aligned, they are parallel to one another. The Cardan Shaft redirects the drive shaft to the travel pinion without changing the course of rotation.
Widely used in industry, cardan shafts have confirmed practical about applications where space is limited-as well because in scenarios where an element in the device train (e.g. paper roll) may need to become actuated (dynamically positioned) to an alternate position when the machines are 
not running. The universal joint allows for limited movement without uncoupling. To make sure adequate lubrication circulation, which in turn stops the universal joints from seizing, cardan shafts are usually installed with an position from 4 to 6 6 degrees at the universal joints. Encounter, though, has demonstrated that the position between your shafts of the driver and driven unit should be kept to the very least, preferably significantly less than 4.36 mrads (0.25 degrees). Ideally, the angles between the driver and influenced shafts and the cardan shaft, displayed as β1 and β2 in Fig. 1, will be equal. Geometrically, this would equate to zero angularity existing between the driver and driven unit: Quite simply, the shafts of the driver and driven machine would be parallel to each other.
Usually it contains a tubular shaft, two sets of Universal Joints and glove system – ferrule stepper, among others. It is certainly a element of the transmission program, its function is certainly to redirect the engine turning movement, after moving through the gearbox and the drive to the wheel, going through the ‘planetary and satellite’ system etc.
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Cardan shaft, often known as cardinal shaft, is a component of torque transmission.