CNC Machining: A Comprehensive Guide to Different Kinds of Springs(flash injection molding Jay)

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Springs are essential components used in various industries for a wide range of applications. They store mechanical energy and release it when required, offering elasticity and resistance against deformation. From small everyday appliances to complex industrial machinery, springs play a vital role in ensuring efficient operations. In this article, we will explore the different kinds of springs produced through CNC machining processes.

1. Compression Springs:

Compression springs are widely used in automotive, aerospace, medical, and numerous other industries. These springs work by absorbing force and returning to their original shape once the compression is released. Made from materials such as stainless steel or high carbon steel, compression springs find application in shock absorbers, valves, electrical switches, and more.

To produce compression springs using CNC machining, the process starts with selecting the appropriate material wire size based on the desired spring characteristics. The wire is then fed into the lathe, where a combination of tools and rollers shape the wire to the specifications required. CNC machines precisely control the parameters such as pitch, diameter, and coil count, ensuring consistent and accurate production of compression springs.

2. Extension Springs:

Extension springs operate in the opposite manner to compression springs. When stretched, these springs exert a force in return, making them suitable for applications that require pulling forces. Examples include garage doors, trampolines, and even medical devices.

During CNC machining of extension springs, the same principles apply as with compression springs. However, instead of compressing the wire, it is extended to achieve the desired length and tension. By carefully controlling the number of coils and the distance between them, CNC machines ensure uniformity and reliability in the final product.

3. Torsion Springs:

Torsion springs provide rotational motion and exert torque when twisted. They are found in various items, including clothespins, door hinges, and ratchets. Torsion springs require precision manufacturing to achieve the desired torque and stability.

Through CNC machining, torsion springs are produced by carefully winding a wire around a mandrel. By controlling the length, diameter, and number of coils, manufacturers can customize the spring's resistance and angular movement. CNC machines offer the accuracy required for consistent production and adherence to tight tolerances.

4. Flat Springs:

Flat springs, also known as leaf springs, have a unique design that enables them to deform when pressure is applied and return to their original shape once released. They find applications in automotive suspensions, measuring devices, and many other industries.

CNC machining techniques used to produce flat springs involve cutting or shaping metal strips into specific shapes and sizes. These strips may be subjected to heat treatment to enhance their mechanical properties further. The precise control provided by CNC machines ensures uniformity among multiple leaf springs manufactured at one time.


Springs manufactured through CNC machining processes offer numerous advantages, including reliability, durability, and tailor-made specifications. Whether it's compression, extension, torsion, or flat springs, CNC machines provide the precision required to meet the demanding standards of different industries.

By harnessing the power of computer numerical control, manufacturers can produce consistent springs with tight tolerances, ensuring optimal performance in various applications. So, whether you need springs for your car suspension or medical device, CNC machining is the process that guarantees exceptional quality every time. CNC Milling CNC Machining