Exploring the Different Kinds of Springs and Their Applications(cnc fixturing Harry)

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Springs are an essential component in various mechanical systems that rely on their ability to store or absorb energy. From simple everyday objects like door hinges and pens to complex machinery such as car suspensions and industrial equipment, springs play a significant role. In this article, we will delve into the world of springs and explore the different types available along with their diverse applications.

1. Compression Springs:

Compression springs are the most common type of springs used, primarily designed to resist compressive forces when they are pushed together. They are usually helical in shape, made from materials such as stainless steel or carbon alloy. These springs can be found in mattresses, automotive suspensions, valves, and even shock absorbers. Producing compression springs through CNC machining involves precision cutting to achieve accurate dimensions, followed by coiling and heat treatment for enhanced strength.

2. Torsion Springs:

Torsion springs function under rotational movements rather than axial compression or extension. These springs operate similarly to a twisted rubber band, exerting torque when twisted. Clocks, garage doors, and clothespin clips are some examples of where torsion springs find application. Constructed using high-quality alloys, torsion springs are produced with careful winding techniques and stress relief processes to ensure consistent angular force delivery.

3. Extension Springs:

Extension springs, often called tension springs, work in the opposite manner to compression springs—offering resistance to stretching forces applied axially. They commonly feature loops or hooks at each end for attachment purposes. Trampolines, garage doors, and exercise equipment frequently employ extension springs. The manufacturing process of extension springs begins with carefully selecting the appropriate wire gauge and material before creating tightly controlled coils using CNC machines.

4. Constant Force Springs:

Constant force springs are unique due to their uniform level of force applied throughout their deflection range. Unlike conventional springs that follow Hooke's Law, these springs operate on the principle of tightly wrapping a ribbon-like strip into a coil. Constant force springs are present in retractable pens, tape measures, and window blinds. Producing them involves precision cutting and shaping of flat metallic strips before coiling and heat treatment.

5. Belleville Springs:

Belleville springs, also known as disc springs or conical spring washers, resemble small cups made from spring steel pressed together in a stack formation. These springs can handle high axial loads with relatively small deflections, making them ideal for applications requiring heavy compression forces and limited space. They are commonly used in clutches, shock absorbers, and electrical switchgear. CNC machining is utilized to cut and shape the circular discs initially, followed by stacking and precisely orienting the springs within an assembly.


Springs come in various types, each specially designed to suit a specific application. From compression springs that absorb shocks to constant force springs ideal for achieving consistent tension, understanding the different kinds available allows designers and engineers to select the appropriate type for their intended purpose. By leveraging CNC machining techniques alongside precise manufacturing processes, the production of high-quality springs guarantees optimal performance and longevity in diverse mechanical systems. CNC Milling