Manufacturing Coil Springs: How Are They Made?


Coil springs are everywhere. They are in watches, children’s toys, power tools and even vehicles. These springs can store mechanical energy; When needed or expected, they release their stored energy to fulfill their purpose.

For example, when you compress a small spring using your fingers, it stores the energy you need to compress it. Once you release your fingers, the spring will spring back or release all of your stored energy.

There are different types of coil springs. You have torsion, extension and very simple compression springs. They all have a similar manufacturing process, but there are a few steps that are unique to each of them. These different processes allow them to have other functions and purposes.

If you’re interested in how they’re made, especially those used in manufacturing, keep reading.

Material selection

Manufacturers can use a variety of materials to make coil springs. One of the most commonly used materials is steel. Generally, steel coil springs are elastic and stiff enough to perform most of the things they are required to do. For example, steel is often used in manufacturing Torsion springs resist torque.

In addition to tensile strength, most springs are made of steel, as they can withstand moisture and the most common chemicals that can easily corrode other materials used for coil springs. Also, they are less expensive than other spring materials.

Some other materials used for coil springs are bronze, titanium and other non-ferrous metals. Non-metallic materials such as plastic can also be used as coil springs, but the number of places where they are used may be limited due to the limited tensile strength of plastic springs.

make spring

After selecting the material, manufacturers will obtain a block or stock of that material and first turn it into a wire. Cables can be manufactured using various processes and machines. However, most DIY people won’t even bother making their spring wire from scratch. Usually, they will just use piano wire.

Once a wire is found or made, this wire is fed into an auto-coiler machine, one of the notable advances. Production technology. This apparatus will twist the long wire into a coil spring.

Auto-coiling machines will do almost all the work for the manufacturer. In addition to being fully automatic, most modern coiling machines are highly configurable. They can also allow the manufacturer to easily adjust the setting for their coil. They can easily change the amount, design, length and even the tension of the spring they want to produce.

For the convenience of the manufacturer, automatic coiling machines operate at high speed, so within minutes, the manufacturer can easily produce the number of springs required for production or sale.

In addition to twisting and bending, the auto-coiling machine can clean and lubricate the wires to make it easier to turn the device into your familiar helical coil. Some auto-coils may also have a pitch tool to change the pitch of the coil being built. Once the coils are wound, they will pass through a cutting tool, which is often at the end of the coiling device.

If the manufacturer only needs to produce a small number of springs, they may have the option of using one the lathe And manually coil the spring using it instead of a special auto-coiling machine, which can be a bit expensive for smaller shops.

Termination and coil storage

Some manufacturers and shops may require additional processing to complete their spring coils. For example, some coil springs need to be ground, tempered, tempered and coated with paint before being stored, sold or used.

Other processes required or performed depend on the type of purpose the spring will serve. For example, if the spring is used as a suspension for a vehicle, these springs may need to be coated with paint to prevent rapid corrosion once the vehicle is purchased and used.


Fortunately, it has become easier for manufacturers to create the coil springs they need to manufacture, sell or use. This is especially true if the manufacturer can acquire an automatic-coiling machine. After getting the machine they only need an operator who can monitor and manage the process.

Meanwhile, DIYers and smiths can easily make coil springs in their shops. They can even skip making the wires they need and rely on spring wires available in the market. Using their traditional tools found in their shop, lathes, wire cutters and hammers, they can have all the spring coils they need.

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