Parabolic and Conventional

Geary suspension 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. 

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.

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.

LEAF SPRINGS
	Double Eye Springs 1-3/4" Wide Leaf Springs constructed with heavy duty spring steel
	Open Eye Slipper Springs 1-3/4" Wide Leaf Springs constructed with heavy duty spring steel (also called 'C-HOOK' spring)
	Hook End Slipper Springs 1-3/4" Wide Leaf Springs constructed with heavy duty spring steel
	Radius End Slipper Springs 1-3/4" Wide Leaf Springs constructed with heavy duty spring steel
	Flat End Slipper Springs 1-3/4" Wide Leaf Springs constructed with heavy duty spring steel
	H.D. Slipper Style Springs 2", 2-1/2" & 3" Wide Leaf Springs constructed with heavy duty spring steel