The electric motor rotating shaft is horizontal, the travel pinion spin axis can be horizontal. The issue is that these axes aren’t aligned, they are parallel to each other. The Cardan Shaft redirects the travel shaft to the drive pinion without changing the way of rotation.
Widely used in industry, cardan shafts have confirmed practical in applications where space is limited-as well while in scenarios where an component in the device train (e.g. paper roll) might need to be actuated (dynamically positioned) to another position when the machines are not running. The universal joint allows for limited motion without uncoupling. To ensure satisfactory lubrication circulation, which in turn prevents the universal joints from seizing, cardan shafts are normally installed with an position from 4 to 6 6 degrees at the universal joints. Knowledge, though, has demonstrated that the position between the shafts of the driver and powered unit should be kept to a minimum, preferably significantly less than 4.36 mrads (0.25 degrees). Preferably, the angles between your driver and influenced shafts and the cardan shaft, displayed as β1 and β2 in Fig. 1, will be equal. Geometrically, this might mean zero angularity existing between the driver and driven device: Quite simply, the shafts of the driver and influenced machine will be parallel to one another.
Usually it involves a tubular shaft, two 
sets of Universal Joints and glove system – ferrule stepper, among others. It is a element of the transmission system, its function is definitely to redirect the engine turning activity, after passing through the gearbox and the drive to the wheel, going right through the ‘planetary and satellite’ system etc.
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Cardan shaft, generally known as cardinal shaft, is an element of torque transmission.
