Exploring Different Kinds of Springs in CNC Machining(torsion snap joints Darlene)

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CNC machining, short for Computer Numerical Control machining, is a versatile manufacturing process that uses computerized controls to drive machinery and produce complex parts with precision. When it comes to producing various products, springs play an essential role in countless applications by providing flexibility, shock absorption, and restoring forces. In this article, we will delve into the world of different kinds of springs and their significance in CNC machining.

1. Compression Springs:
Compression springs are one of the most common types of springs used in CNC machining. Their primary function is to resist compressive forces or provide resistance when compressed. These springs are typically coiled in a helical shape and often used in automotive suspensions, actuators, valves, and more.

To produce compression springs using CNC machining, high-quality materials such as stainless steel, carbon steel, or titanium alloys are utilized. The wire is fed into the machine, where it gets precisely cut and formed into coils with accurate dimensions based on design specifications. This process ensures tight control over spring parameters like wire diameter, coil pitch, number of active coils, and free length.

2. Torsion Springs:
Torsion springs work by exerting torque when twisted. They store mechanical energy and release it when rotated back to their original position. These springs find extensive use in applications ranging from counterbalances to clothespins, garage doors, and even timing devices.

Creating torsion springs through CNC machining involves specialized equipment with rotary tools capable of shaping wires or bars into cylindrical or conical structures with tightly controlled angles and specific leg lengths. The precise production techniques employed guarantee consistency and optimal performance.

3. Extension Springs:
Extension springs are designed to stretch under axial tension loads. These springs can be found in various objects like trampolines, garage door openers, and even toys. They possess an inherent tendency to recoil after being stretched, commonly referred to as restoring force.

Manufacturing extension springs using CNC machining involves feeding a wire or bar into the machine and forming it into a coil while adding hooks or loops at each end. The spring's length, diameter, pitch, and loop dimensions are meticulously controlled during production, ensuring reliable performance and durability.

4. Wave Springs:
Wave springs are an innovative type of flat-coiled compression springs that offer significant space-saving advantages over conventional helical springs. They have multiple waves instead of coils, allowing them to provide similar force but in a reduced axial dimension.

CNC machining offers precise control and flexibility required for manufacturing wave springs. Through advanced software programming and specialized machinery, metal strips with specific thicknesses and widths can be precisely shaped into various wave formations to achieve desired forces and deflections.

5. Constant Force Springs:
Constant force springs are unique because they exert virtually uniform force throughout their entire range of motion. These springs find valuable applications in clocks, retractable reels, tape measures, and more.

CNC machining enables the production of constant force springs through a carefully orchestrated process. Metal strips are accurately cut, shaped, and coiled, resulting in consistent force output across the desired distance or travel. Control over material properties and spring geometry ensures desired performance characteristics.


Springs play a vital role in transforming mechanical energy within various objects and systems. In CNC machining, precision and accuracy are paramount when producing different types of springs like compression springs, torsion springs, extension springs, wave springs, and constant force springs. By employing the capabilities of computer-controlled manufacturing processes, industries can ensure high-quality springs that meet stringent requirements for dimensional accuracy, reliability, and performance. CNC Milling CNC Machining