Автомобилската полуоска се нарекува ипогонско вратило, which connects the differential with the drive wheels. The погонско вратило is the shaft that transmits torque between the gearbox reducer and the drive wheels. There is a universal joint (U/JOINT) at the inner and outer ends of the shaft, which is connected to the reducer gear and the inner ring of the hub bearing through the spline on the universal joint.
Напогонско вратило is a solid shaft that transmits large torque between the differential and the drive axle. Its inner end is generally connected with the side gear of the differential through a spline, and the outer end is connected to the drive through a flange or spline. The wheel shells of the wheels are connected.
Наstructure of the погонско вратилое различно поради структурата на погонската оска. Полу-вратило во не-исклучена погонска оска е цврста целосна оска.