Portal axles: structure and purpose

Today it is possible to cite many examples of improvements and tuning of SUVs. Some do play on the body and suspension, the second changed, and still others do both. Today, however, we consider a very unusual method of tuning, through which you can improve the off-road more effective than any 20-inch wheels. This miracle device is called the portal bridge.

What it is?

The Portal axles – mechanisms with side gears having U-shaped structure. Due to the gear axis rises several inches above the level of the wheel. It is also worth noting that with such bridges is reduced in size main gear and the crankcase.

Why “portal”?

Some drivers think that the name “portal” this axis was due to its characteristic design. In fact, it is so, but the very name of “portal” is of foreign origin and in this case denotes the spatial carrier construction.

Usage

On SUVs such devices are used not so long ago. The principal judges of these bridges are fans of trails “off road”. The reason is that the portal axles significantly improve the ground clearance, what is their main function. And due to the fact that the design is several gears, the drivetrain of the SUV will not tolerate such heavy loads, such as gearbox of a conventional jeep.

It is also Worth noting that portal axles, in addition to its special design, are of particular gear ratio. It often happens that this value differs from the standard in a more "traction" side. Thus, the car becomes more usable on the roads and less dynamic on an asphalt surface. However, for owners of SUVs, which in the most part operate on unpaved roads, the performance loss is insignificant disadvantage.

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Advantages

In the first place, as we have said, the portal axles are significantly increasing the ground clearance. And because the location of the beams between the wheels plays a crucial role, thanks to this axis can increase ground clearance by at least 10 centimeters. For example, if the vehicle is a “hunter” UAZ bridges located above the road surface at a distance of 21 cm, after installing portal, this value increases to 38 see

But that's not the only reason motorists are installing portal axles. Also this device can significantly increase torque, that is to make the SUV more traction. This vehicle can overcome any obstacle, even if it is to carry cargo or tow another vehicle. Dirt, snow, heat and frost – is not a hindrance for this car. It is worth noting that the portal axles have a larger size of the teeth of a pair. Due to this, the SUV becomes more reliable. Also portal axles (Uazovskij «bars» in particular) to evenly distribute the load between the side and the main transmission.