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The outer bearing is moved to the outside of the outer end of the axle tube, supporting hub assembly via the bearing’s outer circumference edge. it is not a quarter as good as it should be. The axle shafts in a three-quarter floating axle (fig. However it has to take the end loads and driving torque. It consists of an axleshaft on each side that is splined on the inner end where it mates to the differential and has a wheel flange where the wheel studs mount at the other end. The axle shaft is bolted to the hub, and, thereby, stabilizes thereof. Three-Quarter Floating Axles . Three-quarter-floating axle definition is - a live axle in which the outer ends of the axle shaft are supported by wheels forming a rigid unit with the shaft and depending on it for alignment. Figure 13-21.—Semifloating rear axle.
In this case, major part of vehicle weight is taken by axle casing and not by axle. Figure 13-22.-Three-quarter floating rear axle. The axle shaft in a semifloating live axle can be removed after the wheel and brake drum have been removed. Three-quarter floating axle design incorporates features of the semi-floating and full-floating axle designs. The Big Seven was launched in July 1937 with a three quarter floating type axle with spiral bevel and the torque tube fitted to a short shaft with Hardy Spicer universal joints and was known as the 'light axle'. Figure 13-23.-Full floating rear axle. Three-Quarter Floating Axle: It's more complex than the semi-floating axle and also more reliable. It helps maintain wheel alignment and handles side thrust and driving torque. This type of floating is usually used in RWD vehicles and has support of bearings which are present in axle housing. Types of Front Axle The semi floating axle is a type of driving axle that supports the weight of the vehicle. A semi-floating axle is very common on the rear of most 4x4s. In a three-quarter floating axle, there is also a hearing inside the axle housing which supports the diff, but the outer bearing is situated between the wheel hub and the axle housing, to support the weight of the vehicle when cornering. While it does have separate hubs, there is only a single wheel bearing per hub. A three-quarter floating axle is the same as semi-floating, with one difference. Three-quarter floating axle design incorporates features of the semi-floating and full-floating axle designs. A three quarter floating axle is same as semi floating with one difference.

The axle shafts therefore must take the stresses caused by turning, skidding, or wobbling of the wheels. A nut retaining the wheel bearing prevents axial displacement of the axle shaft.