Compression Springs A compression spring is an open-coil, helical spring that offers resistance to a linear compressive force applied to the ends. They are usually coiled at a constant diameter but they can also be coiled as a conical, barrel, or hourglass shape.
The ends of a compression spring can be open, open and ground, closed, and closed and ground. Usually the direction of wind in not critical for a compression spring but they can be wound left hand or right hand.
All of these details can be tailored to meet each specific request.
Extension Springs Extension springs are designed to absorb and store energy and create a resistance to a pulling force. Initial tension determines how tightly together an extension spring is coiled. The initial tension is equal to the minimum force required to separate adjacent coils. This initial tension can be adjusted to achieve the load requirements of your particular application.
There are many different types of end loops or hooks that can be used with extension springs. The most common types of ends include machine hooks, full loops, cross-over center loops, centered hooks or eyes, and swivel hooks.
At Marshall Spring, we have the capability to duplicate almost any end required, or design the correct end for your application.
Torsion Springs Torsion springs offer resistance to twist or rotationally applied force. This type of spring will reduce in body diameter and increase slightly in body length when deflected in the preferred position.
As determined by the application, torsion springs can be designed to work in a clockwise or counter-clockwise rotation, which will determine the direction of the wind. A torsion spring is typically closed wound, but pitch can be added to reduce friction between the coils.
As with extension springs, the ends vary greatly on torsion springs. Our machinery and tooling allow us to recreate a wide variety of legs for many different torsion springs.
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