Exploring the World of Different Kinds of Springs in CNC Machining(lazer etched Moira)

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CNC machining has revolutionized manufacturing processes across various industries. From automotive to aerospace, medical devices to consumer products, CNC machining plays a pivotal role in creating intricate and precise components. One critical component that finds ubiquitous application in these industries is springs. Springs come in various forms, serving different purposes based on their unique characteristics and design. This article delves into the fascinating world of different kinds of springs used in CNC machining, shedding light on their production techniques and applications.

1. Compression Springs:

Compression springs are the most common type of springs found in CNC machining. These helical coils are designed to resist compressive forces when subjected to external pressure. To produce compression springs, manufacturers utilize Computer Numerical Control (CNC) machines to form wire into a spiral shape characterized by open or closed ends. The pitch distance between each coil impacts the spring's stiffness, while the wire diameter influences its load-bearing capacity. Such springs find extensive use in automotive suspensions, valves, and industrial machinery.

2. Extension Springs:

Unlike compression springs, extension springs operate under tensile loads rather than compressive forces. They are widely employed in garage doors, trampolines, and various other mechanical systems requiring forceful retraction or pulling actions. CNC machining assists in producing extension springs with tightly wound helixes using wires of varying thicknesses and lengths. The coiled structure extends under tension but returns to its original length once the applied force is released.

3. Torsion Springs:

Torsion springs work differently from compression and extension springs. Instead of resisting axial loads, they provide rotational torque when twisted. Common examples include clothespin joints, mouse trap mechanisms, and balance scales. Crafting torsion springs requires advanced CNC machining techniques where the metal wire is wound in a helical pattern around specially designed mandrels with defined inner diameters. The torque generated is proportional to the wire diameter, number of coils, and material properties.

4. Constant Force Springs:

Constant force springs offer a unique kind of elasticity where their output force remains constant over an extended range of deflection. These springs operate by rolling thin metal strips around a drum, which creates inherent force as they unfurl. CNC machining enables precise manufacturing of these springs, ensuring consistent tension throughout their lifespan. They find applications in medical devices, automatic retractors, and counterbalancing systems.

5. Wave Springs:

Wave springs possess distinctive wave-like contours instead of conventional helical designs. They are predominantly employed when space limitations necessitate compact yet powerful spring solutions. The innovative CNC techniques utilized in wave spring production involve stamping or laser-cutting flat strips, imparting them with specific curves. Such springs are frequently integrated into valve seals, power transmissions, and bearing preloads.

6. Belleville Washers:

Belleville washers, also known as disc springs, have a conical shape formed by CNC machining operations such as punching and grooving. Their ability to generate high loads within minimal space makes them ideal for bolted joints and electrical connections that require controlled pressure distribution. By leveraging precise CNC techniques, belleville washers can be optimized based on required thickness, outside diameter, and curvature dimensions.


CNC machining has transformed the production of different kinds of springs used across industries. Whether it's compression springs providing resilience, extension springs enabling retraction, torsion springs delivering rotational torque, or specialized springs like constant force springs, wave springs, and belleville washers, each serves a unique purpose in mechanical systems. Unleashing the true potential of CNC machines allows manufacturers to fabricate reliable and efficient springs customized according to diverse application requirements. As technology continues to advance, CNC machining will undoubtedly remain at the forefront of producing innovative and versatile springs for future industrial needs. CNC Milling