Exploring Different Kinds of Springs in CNC Machining(can you plasma cut aluminum Hedy)

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Springs play a crucial role in various industries and applications, providing mechanical support, absorbing shock, controlling motion, and storing or releasing energy. In the world of CNC machining, springs are extensively used due to their versatility, durability, and ability to be customized as per specific requirements. This article delves into the different types of springs employed in CNC machining processes, discussing their features, production methods, and applications.

1. Compression Springs:

Compression springs are widely used in CNC machining for their ability to resist compressive forces while returning to their original shape when the force is released. These springs are typically made from high-quality steel wire wound tightly in a helical pattern. The diameter, pitch, length, and number of coils can be adjusted according to the desired load-bearing capacity and deflection characteristics.

Production Process:
- Select suitable spring material considering factors such as temperature resistance, corrosion resistance, and load requirement.
- Determine the coil specifications based on design calculations and requirements.
- Form the wire using a CNC coiling machine; the wire is fed through a system that shapes it into the desired helical form.
- Heat treatment process to eliminate stress and enhance its resilience.
- Shot peening and surface treatment to improve fatigue life and corrosion resistance.

Compression springs find application in numerous areas like automotive suspensions, valves, heavy machinery, medical devices, and aerospace industry components.

2. Extension Springs:

Extension springs work by extending under tension when pulled and return to their original length when the force is removed. These springs consist of tightly wound coils with loops at each end. They are typically manufactured using premium-grade stainless steel wire with excellent tensile strength, ensuring durability and longevity.

Production Process:
- Begin by selecting an appropriate wire size and material grade based on calculated loads.
- Wind the wire around a mandrel using a CNC coiling machine, creating a stretch between the coils.
- Form loops at both ends using CNC bending operations.
- Tempering and stress relieving to enhance durability and fatigue resistance.

Extension springs are commonly used in trampolines, garage doors, farm equipment, medical devices, vacuum cleaners, and various other applications requiring tensioning or stretching functionality.

3. Torsion Springs:

Torsion springs operate by exerting rotational force when twisted about their axis, returning to their original position upon release of the torque. These springs have tightly wound coils with arms extending outward at a fixed angle.

Production Process:
- Select the appropriate wire material based on required strength and environmental conditions.
- Wind the wire around a mandrel using a CNC coiling machine while also maintaining an accurate pitch and diameter.
- Configure the spring's legs into specific shapes using CNC bending techniques.
- Heat treatment process followed by shot peening for enhanced performance characteristics.

Torsion springs find utilization in a wide range of products such as clothespins, door hinges, automotive suspensions, rotary switches, and balance scales, where rotational energy storage or torque equilibrium is vital.

4. Constant Force Springs:

Constant force springs offer uniform resistance over extended distances by storing energy through axial movement. They consist of a pre-stressed ribbon-like metal strip tightly coiled under constant tension.

Production Process:
- Select a suitable metal strip material accounting for factors like space constraints, required lifespan, and temperature limitations.
- Utilize a custom tooling system during CNC coiling to accurately shape the strip.
- Perform heat treatments to eliminate any residual stress.

Constant force springs are widely employed in retractable cords, tape measures, window blinds, cable reels, and counterbalance mechanisms where smooth and consistent linear motion is essential.


CNC machining has revolutionized the production of different types of springs, resulting in more precise and efficient manufacturing processes. From compression to extension, torsion to constant force, various springs offer unique functionality and find indispensable applications across different industries. By understanding the characteristics and production methods of these springs, manufacturers can ensure their products operate effectively and reliably while meeting specific requirements. CNC Milling