Exploring Different Kinds of Springs in CNC Machining(surface roughness chart Moira)

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CNC machining, also known as computer numerical control machining, has revolutionized the manufacturing industry with its precision and efficiency. This advanced technology enables the production of various components and products, including different kinds of springs. In this article, we will delve into the world of springs, discussing their types, uses, and the process of producing them through CNC machining.

Types of Springs:

1. Compression Springs:
Compression springs are one of the most widely used springs. They operate by compressing under loads to provide resistance and store potential energy. These springs find applications in automotive suspension systems, industrial machinery, and household appliances like washing machines and mattresses.

To produce compression springs using CNC machining, a coiled wire is fed into the machine, which utilizes specialized tools to precisely cut the wire at desired intervals and form it into a helical shape. The dimensions, pitch, and number of coils can be adjusted to meet specific requirements.

2. Extension Springs:
Extension springs work by resisting stretching forces and returning to their original length when the load is removed. They are commonly found in garage doors, trampolines, and various mechanical assemblies requiring tension.

CNC machining processes extension springs by feeding a straight wire into the machine, cutting it at desired lengths, and forming loops or hooks on both ends. Accurate measurements and consistent force characteristics are crucial for these springs' performance.

3. Torsion Springs:
Torsion springs exert torque as they twist about their axis. They are typically used in applications such as door hinges, clipboards, and clothespins.

CNC machining plays a significant role in producing torsion springs. It involves winding flat or round wire around a mandrel, creating coil setups that provide precise angles and enough strength for required torques. The machined springs undergo heat treatment processes to improve their elasticity and longevity.

4. Constant Force Springs:
Constant force springs maintain a consistent level of force throughout their extension or contraction. These springs are used in applications like window counterbalances, retractable pens, and tape measures.

Manufacturing constant force springs through CNC machining requires the coiling of strip steel onto a drum. The resulting spring has tightly wound layers that minimize friction and ensure smooth tension distribution.

5. Belleville Washers (Disc Springs):
Belleville washers, also known as disc springs, provide high-energy storage capacity within a small space. They are commonly seen in automotive clutches, electrical connectors, and bolted joints.

CNC machining is employed to produce belleville washers by cutting circular disks with specific thicknesses from various materials such as stainless steel or carbon steel. Accurate shaping and finishing processes yield dependable, durable disc springs.


CNC machining plays a crucial role in producing different kinds of springs required for a multitude of applications. From compression and extension springs to torsion springs, constant force springs, and belleville washers, precision manufacturing ensures reliability, performance, and longevity. Utilizing the capabilities offered by CNC machines, engineers can create custom springs tailored to meet specific requirements, making them an indispensable part of our industrial landscape.

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