A parabolic spring is basically a leaf or a set of leaves which are tapered in a parabolic way rather than a linear.
Parabolic springs consist of one or more leaves. The leaves touch only the middle, where they are fixed to the axle and the outer ends. They do not touch each other in between those 2 points as they do with conventional leaf springs. Each leaf represents a complete spring in itself and therefor will act as the same. To enable this, the leaf is tapered from the centre to the outer end. This parabolic rolling process means that every centimetre the thickness of the leaf/blade decreases in an amount that relates to the square function of its length.
Today, the parabolic spring is a bestseller and the demand for parabolic springs in South Africa is growing greater by the day. Parabolic springs are mostly used in commercial vehicles. This is understandable as the easy assembly of springs leads to an almost perfect fitting accuracy with enhanced traveling comfort and importantly a longer life cycle.
The reason for a longer life span is that when the springs are rolled out in the parabolic mill, they vary in thickness in turn leading to an even distribution of stress. Although parabolic springs are designed lighter and thinner than traditional multi-leaf springs they process an improved durability and resistance.
The weight reduction of approximately 35% considerably reduces the weight of the vehicle to which they are mounted and this in turn reduces fuel consumption of the vehicle which compensates for higher production cost of parabolic springs.
We stock a wide range of parabolic leaf springs, as well as the bushes and other components