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Torsion Springs

Torsion Spring Manufacturer

Spring Engineers is an experienced torsion spring manufacturer. We can help design and manufacture a standard or custom double torsion spring with variable end configurations, body coil, and coil direction. If you have questions or looking for assistance in your spring design, contact our experts.


Torsion springs are helical springs used to apply a torque or store rotational energy. The two most common forms of torsion springs are single-bodied and double-bodied springs. A common example of a single-bodied torsion spring is that used in a clothes pin.

Torsion springs are most often mounted on a shaft of arbor as they must be supported at three or more points. The end configurations (legs) of torsion springs are numerous and are entirely dependent on the needed application. Legs can be straight, angled, hooked or many other shapes as required to secure the ends during rotation.

Double Torsion Spring

The double torsion spring is a single spring but consists of two sets of coils, one set coiled right hand and one set coiled left hand. The double torsion spring has two sets of coils connected, usually with an unwound section between the coils and work in parallel.

The body coils of a torsion spring are usually close wound but can incorporate a pitch (spacing between the coils) if needed to reduce frictional losses. Rate calculations for torsion springs must consider friction between adjacent coils as well as friction between the torsion spring body and the arbor over which it revolves. Torsion spring loads should be specified at fixed angular positions, not at a fixed deflection from the free position.

It is important to note - While every spring manufacturer will have a variety of torsion spring testing equipment and procedures, there is no "standardized method" to test loads for torsion springs. (See "Encyclopedia of Spring Design" published by the Spring Manufacturers Institute)

Design of Torsion Springs

Torsion springs can be designed to operate in either a clockwise or a counter-clockwise direction but whenever possible they should be designed so that the body diameter decreases when a load is applied to the spring. The Arbor diameter of the spring must allow for this reduction to avoid interference during loading. Consideration must also be given to the fact that the torsion springs body length will increase when loaded.

Spring Engineers are experts with years of experience in the design of many types of springs for various industries. If you are looking for a torsion spring manufacturer to assist with the design of your spring or for more info 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!  

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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.