BPW rigid axles are the strong backbone for your trailer. They are rugged, have an extremely high load capacity and are competitively light.
The axle stub of the axle beam holds the wheel bearings and therefore the hub to which the wheel is mounted by means of the wheel studs. Depending on the brake type, the brake disc or brake drum is connected to the hub. The brake anchor plate is welded onto the axle beam and provides the connection to the brake. The brake caliper is bolted on disc brake axles. On axles with drum brakes, it holds the brake shoes. The axle connection joints the axle to the suspension. The wheels, axle and suspension form the running gear and are mounted on the chassis of the trailer or the semitrailer.
The most important feature of a rigid axle is the connection between both ends of the axle through a single-part axle beam. If the position or angle of one wheel changes, e.g. spring compression on one side, the other wheels will be forced upwards. This also applies to changes in the camber and toe-in.
The axle transfers the static, dynamic and vertical wheel loads acting on the wheels, longitudinal forces acting in the direction of travel (e.g. caused by braking) as well as transverse forces which occur during cornering, for example:
(1) Brake anchor plate for disc brake, (2) Centring frame, (3) Track, (4) Spring centre, (5) Support bearing box, (6) Base plate, (7) Brake anchor plate for drum brake, (8) Axle stub
BPW Rigid Axles - Features and Benefits
For axle loads up to 20 t
Versions with air or mechanical suspension
Versions with disc or drum brake
With (mounted) BPW brake cylinders
Wheels with or without offset
Single or twin tyres
Wheel sizes from 12 to 24 inches
Stud or hub centring
For disc wheels (steel or aluminium) or star wheels (TRILEX)
ABS can be retrofitted
All axles also have cataphoretic dip-coating and zinc-phosphating (KTLZn) at inaccessible points such as in cavities to provide optimum protection against corrosion
BPW axles and suspension units are resistant to temperature effects in line with NATO requirements.
* The specified axle loads (see "Technical details") are maximum values on the ground up to 105 km/h (65 mph). In vehicles with a slower permitted maximum speed, the following axle load increases are possible with BPW: Vmax. 40 km/h + 10%, Vmax. 25 km/h + 25%, Vmax. 10 km/h + 40%. Please also refer to the load rating data provided by the wheel and tyre manufacturers.