Front rigid axles are mainly used on trucks and buses. The front axle steering knuckle has a flange, to which the brake disc is attached, passing into a pin on one side. The wheel hub is usually mounted on two rolling bearings on the journal. There are two lugs on the other side of the collar, by means of which the steering knuckle is connected by a pin to the axle beam, ended with heads. In the ears (switch arms) brown sleeves are pressed in, constituting the sliding bearings of the pin. Switches are equipped with steering linkage levers. Steering wheel steering knuckle (mostly left) it usually has two levers, and the right - one. Thrust roller bearings are located between the axle heads and the lower arms of the steering knuckles, facilitating the turning of switches. The rear load axle is found in cars with front-wheel drive only. It is made in the form of a straight steel beam (like for example. in the FSO Syrena) or bent downwards, mostly tubular. The car wheels are rotatably mounted on the ends of the axle. The rear load axle is most often suspended on a transverse leaf spring to the car frame above its center of gravity.