The electric motor rotating shaft is horizontal, the travel pinion spin axis can be horizontal. The difficulty is that these axes are not aligned, they will be parallel to each other. The Cardan Shaft redirects the travel shaft to the drive pinion without changing the course of rotation.
Trusted in industry, cardan shafts have verified practical about applications where space is limited-as well as in scenarios where an element in the device train (e.g. paper roll) might need to end up being actuated (dynamically positioned) to an alternate position when the equipment are not working. The universal joint permits limited movement without uncoupling. To make sure satisfactory lubrication circulation, which helps prevent the universal joints from seizing, cardan shafts are usually installed with an angle from 4 to 6 6 degrees at the universal joints. Knowledge, though, has demonstrated that the position between the shafts of the driver and motivated unit should be kept to the very least, preferably significantly less than 4.36 mrads (0.25 degrees). Preferably, the angles between 
your driver and influenced shafts and the cardan shaft, demonstrated as β1 and β2 in Fig. 1, will be equal. Geometrically, this would equate to zero angularity existing between the driver and driven device: Put simply, the shafts of the driver and influenced machine would be parallel to each other.
Usually it consists of a tubular shaft, two sets of Universal Joints and glove system – ferrule stepper, amongst others. It can be a element of the transmission system, its function can be to redirect the engine turning movements, after moving through the gearbox and the travel to the wheel, going through the ‘planetary and satellite’ system etc.
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Cardan shaft, also referred to as cardinal shaft, is an element of torque transmission.