Standard and Custom 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.