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Custom Coil Springs

Spring Engineers is an experienced coil spring manufacturer. Whether you need compression, extension, or torsion coil springs, we can help design and manufacture custom coil springs to your specifications. Contact us today for assistance with the design of your spring or to discuss how we can help on your next project.


Custom Coil Springs Design Specifications And Tolerances

Coil springs come in many forms but there are three common classes; Compression coil springs, extension coil springs and torsion coil springs. Regardless of which is used, coil springs must be designed to satisfy four operating requirements: Energy, Space, Environment and Service.

Energy is the first consideration in coil spring design because a spring is by definition a device for storing energy. Energy is a function of load and travel (deflection). Thus the energy of a coil spring can be specified by:

  1. Two loads at two lengths

  2. Rate and a load at a length

  3. Free length and a load at a length

Space is defined by the operating envelope, the area in which your coil springs will operate. In the case of a compression spring, this might be the hole into which the spring fits, the rod over which it operates, the maximum free length to allow cap threads to engage and a maximum solid length (though not the product of coils times wire size!).

Custom Coil Spring Environmental Factors

Coil spring environmental factors include heat, cold and corrosion. Pick a material to suit the environment in which the coil springs operate and you automatically choose a modulus of rigidity and a material strength.

Finally, the intended service of coil springs helps to decide how much of that material strength you could or should use. Will your coil springs require service that is static or dynamic? Is the range of stress large or small? Is the life expectancy short or long? These questions help to decide what percentage of the ultimate strength to use for your coil springs.

Mix these operating specifications well, put them through an effective computer design and analysis program, formulated specifically for coil springs, and you have a quality product.

Keep In Mind...

Remember that coil springs are formed, not machined. Material is forced into an unnatural shape, then heat treated or stress relieved where it changes shape again. Material diameter, spring diameter and spring length are all subject to change and need to be toleranced in such a way as to get the best fit for your operating requirements. This is what you are paying for, quality coil springs.

Spring Houston specializes in the manufacturing of coil springs. For assistance or more info on coil spring manufacturing or design, contact us today and a spring expert will assist you. For more information on spring design, download our Spring Design E-Book. If you have a CAD drawing ready, and would like us to manufacture your springs, send us your CAD drawing today to get started!

Custom Coil Springs Design

Spring Houston offers a wide range of services besides spring manufacturing, such as custom spring design, spring corrosion and wear prevention assistance and spring failure analysisAdditionally, we manufacture springs with a wide range of different materials, like AISI 1095 Spring Steel, Music Wire, Chrome Silicon Spring Steel, Elgiloy, Inconel X750 and more. View our materials page to see a full list of options.