Spiral Springs

Inspired by nature

Specialists in complex spiral spring analyzed using FEM tools

Our engineering team collaborates with your engineers to study, design and create the perfect tailor-made spiral spring your highly dynamic application requires. We are proud to say that we are a global leader in the manufacture of spiral springs. Cam-phase systems associated with motor management (Variable Camshaft Timing Powertrain – VCT) is the most typical application, so they are exposed to high dynamic loads. Spirals have imaginative shapes, inspired by nature, which reduce contact between the loops to prevent premature breakage and exert improved hysteresis control.

FEM/FEA analysis is critical and the next step after this is always to validate spirals on fatigue test benches with the final assemblies to verify their final performance. We can manufacture spiral springs in torsion spring machines or using bending technology depending on the shape and the annual quantities.

Advantages and benefits of spiral spring

Nature as an inspiration: the spiral is a natural shape, frequently found in nature, that evokes the evolution of a force, of a state.
Analyzed with FEM/FEA and proven on fatigue test benches before production
Built for high dynamic loads, geometry that reduces coil contact and controls hysteresis for long fatigue life

Types of spiral springs

Measures

Strip thickness: 0.05-12 mm (0.002-0.4 in)
Strip width: 2-120 mm (0.08-4.7 in)

Materials

The choice of the right material, surface treatment and coating are critical for the final quality and safety of the product. From stainless steels to the most specific materials bought in from the best suppliers.

Carbon steel, almost for every application.
Stainless steel, ideal for high stress and fatigue applications.
Inconel
Elgiloy
Hastelloy
Chrome silicon
Other materials according to your special requirements

Industries / Applications

Automotive

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Industrial

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Power tools

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Consumer Goods

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Other industries

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Frequently Asked Questions

What is a spiral spring?

A spiral spring is a flat strip wound in a flat, 2D spiral (Archimedean spiral). It stores and releases energy through angular deflection and is used where a compact torque or force element is needed in a flat plane. Spiral springs are common in precision instruments, torque controls, and consumer product mechanisms.

How do spiral springs differ from power springs?

Both use flat strip material wound into a coil. Spiral springs are typically smaller and designed for low-torque, precise applications, such as instrument pointers, dial mechanisms, and return mechanisms. Power springs are designed for higher energy storage and larger torque output in retraction and drive applications.

What industries use spiral springs?

Spiral springs serve precision instruments, clocks, medical diagnostic devices, consumer electronics (camera shutters, autofocus mechanisms), and industrial controls. They are also used in aeronautical instruments and military equipment where compact, reliable return mechanisms are required.

Do you manufacture spiral springs for aerospace applications?

RPK Group manufactures precision spiral springs for aeronautical applications. These components require tight angular-rate tolerances, specific materials for temperature stability, and full traceability. Contact our engineering team for requirements for aerospace-grade springs.

Get the most out of our expertise

Our engineers work alongside our customers to find the best solution for them, applying scientific methods and knowledge accumulated over almost 50 years.