The engine rotating shaft is horizontal, the travel pinion spin axis is also horizontal. The problem is these axes are not aligned, they are parallel to each other. The Cardan Shaft redirects the drive shaft to the travel pinion without changing the route of rotation.
Trusted in industry, cardan shafts have tested practical on applications where space is limited-as well while in scenarios where an factor in the machine train (e.g. paper roll) might need to end up being actuated (dynamically positioned) to another position when the equipment are not running. The universal joint permits limited motion without uncoupling. To make sure enough lubrication circulation, which in turn avoids the universal joints from seizing, cardan shafts are usually installed with an angle from four to six 6 
degrees at the universal joints. Knowledge, though, has shown that the angle between your shafts of the driver and driven unit ought to be kept to the very least, preferably less than 4.36 mrads (0.25 degrees). Ideally, the angles between the driver and driven shafts and the cardan shaft, demonstrated as β1 and β2 in Fig. 1, will be equal. Geometrically, this would mean zero angularity existing between the driver and driven product: In other words, the shafts of the driver and influenced machine would be parallel to one another.
Usually it contains a tubular shaft, two sets of Universal Joints and glove system – ferrule stepper, amongst others. It is a element of the transmission system, its function can be to redirect the engine turning movements, 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, also called cardinal shaft, is an element of torque transmission.
