Parabolic springs are a modern implementation of the traditional leaf spring.
While both are quite similar in overall shape, a parabolic spring has fewer leaves and tapers at each end compared to leaf spring which features multiple leaves and has a step down effect with each leaf being progressively shorter than the one above. Whereas each leaf on a leaf spring touches the next, a parabolic spring usually touches only at the centre of the spring and towards the ends of the spring. This prevents unwanted inter-leaf friction. These springs commonly feature a thin metal plate known as a ‘spacer’ in the centre which prevents friction further.
One benefit of a parabolic spring is that they generally use less steel than their multi-leaf counterparts which therefore has a weight saving effect on the vehicle. Another benefit is parabolic springs tend to have more flexibility and produces a ride that is not as stiff. This is why parabolic springs are commonly used on buses as they tend to provide a smoother ride.
Owen Springs can manufacture parabolic springs at its Rotherham site and are the only company in the UK that has a parabolic taper mill and therefore the capability to do so. We hold over 3000 parabolic springs in stock and can deliver most requirements next day in the UK.
Need a spring but don’t know the part number? No problem, our friendly customer care team will use their knowledge and experience, along with our vehicle recognition system, to ensure you get the spring you need.