BPW launches new 27 degree self-steer axle to maximise longer trailer manoeuvrability and payload
BPW has launched a new self-steering axle to the UK market for semi-trailers which enables up to 27 degrees of steering angle. This market leading capability will now offer trailer builders and transport operators the option of fitting the BPW self-steer axle on trailers which are 15.6 metre in length, as well as the standard self-steer axle, with up to 20 degrees of steer, for 14.6 metre trailer lengths.
Following the longer trailer consultation results, Keith Marriott from BPW's UK technical support department, concludes that "in a business where payload capability is key, this exciting new development can give the transport operator the capability of carrying up to 44 tonne GVW, whilst offering considerable cost and weight reductions over traditional command steer options."
With the BPW modular manufacturing system, this 27 degree self-steer axle can be supplied with either drum or disc brakes, and encompasses the BPW patented loaddependent tracking facility. This unique feature means that it is not necessary to lock the steer axle whilst the vehicle is travelling forward, regardless of speed. The weight of the load acting on the unique pressure bearing keeps the wheels in the straight ahead position until steering scrub is introduced. Equally important, considering the potential difficulties of operating longer trailers when reversing, the self-locking facility automatically locks the steering mechanism in the straight position as soon as the trailer starts to reverse.
The BPW self-steer axle has a unique undulating washer king pin design and this means that it is not necessary to have the truck and trailer in a straight line position to engage the steering lock, the front end of the vehicle could be hard up against an obstacle but by introducing opposite lock/scrub the lock will engage within one revolution of the wheel.