SPEC® Mechanical Torsion Springs are coil springs that fit into rotary applications, unlike Compression Springs and Extension Springs which only work in a linear direction. The Torsion Springs are attached to two components. As they rotate around the central axis of the spring, they create a rotational force that returns the components to their original position.

These springs are tightly wound (as indicated by the standards for the products in the table below); however, a pitch can be added during the manufacturing to reduce friction. Torsion Springs are usually placed on a mandrel, shaft, or support rod. The recommended mandrel sizes allow approximately 10% spacing for the deflections (shown in the table).

The springs must be deflected in the direction of winding of the coils. Unwinding the spring reduces the maximum load. Standard parts are available in different configurations for the ends (angles).

The catalog parts Associated Spring RAYMOND has in stock are available in a wide variety of unfinished materials. If a part is needed with a different finish or characteristics, contact Associated Spring RAYMOND for engineering solution services.

See our FAQ section for terminology definitions if needed.

The maximum recommended service temperatures for these materials are as follows:

• Piano String (applications up to 121°C / 250°F)
• Stainless Steel (applications up to 260°C / 500°F)
• Type 316 Stainless Steel (applications up to 300°C / 570°F)