SEM SB: Single bar system

The primary component in the SEM SB system is a steering wedge. This is connected to the tractor fifth wheel, this enables the direct transfer of the steering motion to the rear axle(s) which are mounted on an axle mounting frame.

When the trailer is coupled to the truck, the steering-wedge will lock into the fifth wheel of the truck. The coupling plate with steering wedge, which is mounted on the trailer, will rotate when the truck makes a turn and thus transfer the movement through the bar to the rear axle. The position of the bar on the fifth wheel unit and the axle mounting frame defines the steering angle.

The main advantages are:

  • Improves the maneuverability of the vehicle
  • Saves tyre wear
  • Reduces maintenance costs
  • Improvement of fuel costs
  • Reduction in damage costs
  • Increased load capacity
  • Constant & consistent steering behaviour (full or empty)
  • Reliable
  • Low maintenance
  • Broad applications suitability

Technical Specification

Number of steered axles
Fifth wheel load
18t max.
Axle load
Spring centres
Chassis centres
Gross weight 1 steered axle