Exploring Different Kinds of Springs and Their Applications in CNC Machining(how do annular snap joints work Benjamin)

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Springs play a crucial role in various industries, from automotive to aerospace, providing the necessary mechanical support and functioning. In this article, we will delve into the fascinating world of different types of springs used in CNC machining processes. We will explore their properties, applications, and highlight their importance in manufacturing precision components.

1. Compression Springs:

Compression springs are among the most common types of springs used in CNC machining. They work by resisting compression forces and returning to their original shape when the applied load is released. These springs find application in numerous industries such as automotive suspension systems, construction equipment, electronic devices, and more. Manufacturing such springs involves shaping tempered steel wire into a coil using specialized machinery.

2. Extension Springs:

Extension springs function opposite to compression springs, offering resistance when pulled apart and extending under tension. They find extensive use in trampolines, garage doors, and various industrial applications demanding controlled extension or retraction movements. Producing high-quality extension springs involves precise bending techniques, ensuring consistent force and length ratios across multiple cycles.

3. Torsion Springs:

Torsion springs act through rotational or twisting forces, exerting torque when subjected to an angular deflection. These springs store and release energy efficiently, making them ideal for counterbalancing mechanisms, steering systems, and even within timepieces. Manufactured primarily from hardened steel or alloy materials, torsion springs undergo a specific heat treatment process for enhanced durability and reliable performance.

4. Die Springs:

Die springs are specifically designed for heavy-duty applications that require significant loads to be compressed repeatedly. With impressive shock-absorbing capabilities, they can absorb sudden impacts without becoming deformed. As vital components of stamping dies, die-casting machines, and injection molding tools, these robust springs provide stability, enhance production efficiency, and improve tool life.

5. Wave Springs:

Wave springs are innovative and versatile, offering a compact alternative to traditional round wire springs. These flat coiled springs feature multiple waves and can be used individually or stacked to achieve precise load requirements in limited spaces. Industries such as medical devices, automotive transmissions, and aerospace employ wave springs for their ability to reduce machine size while maintaining desired force and reliability.

6. Constant Force Springs:

Constant force springs provide continuous resistance throughout their deflection range, ensuring consistent torque output. These springs find application in retractable reels, tape measures, window-washing systems, and more. Manufacturing such springs involves tightly winding pre-stressed strip material, resulting in an extended lifespan and minimal variation of force during operation.

7. Belleville Springs (Disc Springs):

Belleville springs, also known as disc springs, consist of conical washers that work by exerting a characteristic spring force proportional to the applied load. Their unique design allows for high loads in small spaces, making them suitable for applications such as valves, pumps, clutches, and electrical connectors. Fabricating disc springs requires precision machining operations, ensuring exact dimensions and optimal performance.


Springs play an indispensable role in CNC machining processes across various industries. Whether it's compression, extension, torsion, die, wave, constant force, or belleville springs, each type has its own distinct properties and applications. By understanding the different kinds of springs available and their roles in CNC machining, manufacturers can select the most suitable option to ensure reliable performance, increased efficiency, and long-lasting products. CNC Milling CNC Machining