eFunda's Compression Spring Calculators

How to make compression springs

Extension Spring Design Calculator and Formula - Engineers Edge

How to make extension springs

Torsion Spring Design Calculator and Formula - Engineers Edge

How to make torsion springs

Serving, supporting and educating North American precision spring manufacturers in their pursuit of competitiveness in global markets.

ESF is a federation of national associations, representing spring manufacturers and distributors.

As well as finding information on all our members, UKSMA's main aim is to help put its members in touch with potential customers.

CASMI was founded in 1944 as a not-for-profit trade association dedicated to the development of good business practices, and sharing of technical information through ongoing communications among the job-shop spring manufacturers in the Greater Chicago area.  Membership now includes 62 companies in Illinois, Indiana and Wisconsin.

The VDFI is the industry professional association of the German industry for technical feathers/springs.  With more than 100 members the federation represents approximately 85% of German feather/spring production.  The VDFI represents the economic and technical interests of the German feather/spring industry.

The Institute of Spring Technology (IST) is the UK based unique center of excellence for all kinds of spring research, offering a wide range of products and services to the spring industry supply chain, as well as non-spring components.  All companies involved in the manufacture of all spring types, spring end users, spring material, machinery and consumable suppliers, as well as any other company within the spring industry supply chain both UK and World-Wide can benefit from the IST's specialist technical services and research facilities.

The association consists of manufacturers of precision springs, material suppliers and vendors of various outside processes associated with the spring industry.  Membership is open to any United States West Coast company or West Coast branch of an International company engaged in the spring making industry.