Leaf Springs

Parabolic and Conventional

Geary Springs And Sons (PTY) LTD  manufactures a full range of high quality leaf springs for all makes of vehicles in the automotive industry. This includes on and off road truck, commercial trailer, heavy equipment, overload, light trailer, passenger car and 4X4 sport utility. If you are looking for automotive springs in Durban, Kwa-Zulu Natal, South Africa, then Geary Springs And Sons (PTY) LTD  are your best bet. There are few spring manufacturers in Durban who are able to compete with our spring products or our pricing.

Geary’s specialize in heavy truck applications and can produce springs with leaves up to 100x24mm in cross section.




What is a parabolic spring? 
Basically a HST Parabolic Spring is a spring that consists of two or more leaves. The leaves touch only in the center, where they are fixed to the axle and at the outer ends, where they are fixed to the vehicle. In between those two points the leaves do not touch each other as they do with conventional leaf springs.
Each leaf represents a complete spring in it’s self and will act as such. To enable this, the leaf is tapered, from the center (thick) to the outer ends (thin). This tapering is parabolic; it means that every centimeter (or inch) the thickness of the leaf decreases in an amount that relates to the square function of its length.




This may sound complicated but in fact it is very simple. Every single leaf will have, more or less, the shape of a complete multi leaf spring and thus it’s capable to cope with the same forces. A 2 or 3 leaf parabolic spring can divide the stresses more evenly across the other leaves and thus more axle movement is possible. That is why we designed 2 and 3 leaf springs.

Spring Repairs
We have a large repair division where springs may be reset, repaired or “reinforced” with extra blades for loading purposes. We manufacture to exact O.E. specifications or we can custom design springs to suit your own unique needs or modifications. Our spring factory in Durban, manufactures springs to the highest standard, and repairs on springs are also carried out to the highest standards.

Trailer Springs
Trailer springs are manufactured for large and small type trailers with heavy duty or extra heavy duty material. The smaller type trailer springs such as the box trailer, ski boat, scotch cart etc. are available in kit form or loose parts made in slipper eye or double eye form. All of these are once again available as part of our range of automotive springs from our spring manufacturing plant in Durban.