Spiral Springs

Spiral Springs

Spiral springs play a specific role in mechanisms that require stored torque and progressive energy release. Also known as spiral ribbon springs, these components are used to generate controlled rotational movement, especially in return or automatic repositioning systems. Their geometry allows the applied force to be distributed efficiently, even in reduced spaces.

These components are produced in several formats, with customized dimensions according to the application needs. The most common materials are stainless steel and carbon steel, ensuring excellent performance in environments with different mechanical and thermal requirements. Material selection considers factors such as tensile strength, flexibility, corrosion resistance, and compatibility with the operational environment.

Main industrial applications

The use of spiral-type springs is common in contexts that require precise and consistent motion, such as component repositioning, mechanical actuation and force compensation in automated systems. Equipment operating under repetitive cycles—such as power tools, mechanical timers and clutch systems—are classic examples. These springs are also essential in rewind and retraction mechanisms, such as those found in measuring tapes, ratchets, tensioning systems and cable winders. In sectors such as household appliances, automation, telecommunications, and even medical devices, the versatility of this solution proves crucial for improving the movement of mechanical assemblies.

Key benefits include:

• Constant torque force: ideal for mechanisms requiring precision in movement cycles.
• Compact format: allows efficient integration even in limited space.
• Low permanent deformation: ensures dimensional stability through thousands of cycles.
• Automatic return devices;

The spiral geometry allows force to be distributed linearly along angular displacement, reducing the risk of jamming or failures due to overload.

What differentiates spiral ribbon springs from other types?

The spiral ribbon spring stands out for its flat helical configuration and the type of mechanical effort it absorbs: it operates primarily in torsion—unlike compression or extension springs.

Key differentiators include:

• High torque density: even in compact structures, delivers significant force.
• Progressive return: ideal for smooth and continuous movements.
• Long service life: designed to withstand repetitive cycles without loss of elasticity.

Its purpose is to store energy when coiled and release it gradually, enabling controlled rotational motion. It should not be confused with standard helical springs, which, although also coiled, function completely differently. Helical springs usually work under compression or tension and are used to support axial loads. Unlike conventional mechanical springs, spiral springs can be engineered to provide constant force throughout rotation, making them ideal for specific applications. When custom manufactured, they meet the exact requirements of projects requiring regular cycles, low wear and high durability.

Structural alternatives: helical spring and mechanical spring

Although they belong to different categories, there are projects where helical springs can replace or complement the function of spiral-type springs. While spiral springs work in a spiral plane, helical springs operate on the longitudinal axis with axial deformation.

Mechanical springs, in a broader sense, encompass all springs that store elastic energy for later use — including torsion, tension and compression versions.

Each structure offers distinct advantages:

• Spiral springs: constant torque in continuous rotation;
• Helical: axial resistance with high elasticity;
• Custom mechanical springs: total adaptability to the project.

Therefore, spring selection must consider the type of movement, applied load and dimensional limitations of the equipment.

Specification and installation considerations

The efficiency of spiral springs is directly linked to correct specification and assembly. Designing or applying these springs without considering technical parameters compromises system operation.

See below the main points of attention:

• Winding direction: must be compatible with system movement.
• Environment-compatible material: resistance to corrosion, temperature and chemical agents.
• Torque and rotation angle limits: exceeding parameters compromises the metal strip structure.
• Precise fixation: the center and ends of the spring must be properly anchored.

• Torque progressivo: ideal para movimentos controlados e constantes.
• Structural compactness: serves systems with limited available space.
• High precision: ensures smooth and repeatable operation.
• Application versatility: can be integrated into mechanical, electromechanical or automated mechanisms.

Improper use can cause jamming, loss of force and accelerated wear of the metal blade.