DRIVE SHAFT: It is the shorten name of Constant Velocity Drive Shaft, another name is

Half Shaft. It is the key part in chassis system of a car. One Drive Shaft is assembled by

one outer joint, inner joint and one axle. One front drive car has two drive shafts (left si

de and right side), one rear drive car has for drive shafts (two in left side, two in right si

de). The advantage of one Constant Velocily Joint structure is high strength, low noise,

high efficiency, low weight, also, the advantage of one Inner Constant Velocily Joint str

ucture is high efficiency of axial slipping, all of these advantages makes one the car has

good performance in driving, and smooth steering, this kind of structure is wildly used

in most of current front drive vehicles and four wheel driving vehicles.