The motor rotating shaft is horizontal, the drive pinion spin axis is also horizontal. The trouble is these axes are not aligned, they are parallel to each 
other. The Cardan Shaft redirects the travel shaft to the drive pinion without changing the direction of rotation.
Widely used in industry, cardan shafts have verified practical on applications where space is limited-as well since in circumstances where an element in the device train (e.g. paper roll) might need to always be actuated (dynamically positioned) to another position when the machines are not working. The universal joint permits limited movements without uncoupling. To ensure enough lubrication circulation, which avoids the universal Cardan Shaft china Joints from seizing, cardan shafts are usually installed with an position from four to six 6 degrees at the universal joints. Experience, though, has proven that the angle between the shafts of the driver and influenced unit ought to be kept to a minimum, preferably significantly less than 4.36 mrads (0.25 degrees). Preferably, the angles between the driver and powered shafts and the cardan shaft, displayed as β1 and β2 in Fig. 1, would 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 includes a tubular shaft, two sets of Universal Joints and glove system – ferrule stepper, amongst others. It is definitely a element of the transmission program, its function is normally to redirect the engine turning movements, after passing through the gearbox and the travel to the wheel, going right through the ‘planetary and satellite’ system etc.
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Cardan shaft, also known as cardinal shaft, is an element of torque transmission.