Spiral Torsion Springs

Spiral torsion springs seem like the variable force springs at the appearance, also called clock springs, flat torsion springs, flat coil spiral springs, motor brush springs, etc. They are normally made of high carbon steel strips or high yield 301 stainless steel strips.

Yongsheng can design, manufacturing, assembly spiral torsion springs for you. You can also opt for your ideal spiral torsion spring types in the below table, if can’t, directly customize it.

  1. Quick prototyping within 3 days.
  2. Assembly & Mounting service.
  3. Saving your money with mass ready-made toolings at hand.
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Advantages of YongSheng spiral torsion springs

YongSheng has produced hundreds and thousands of spiral torsion springs and has served more than thousand of clients worldwide, let us make the springs for your in the next order.

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Yongsheng Spiral Torsion Springs Design

When designing a spiral torsion spring, most of all, we need to know the application of the spiral torsion springs.

Compared with other’s flat coil springs, The spiral torsion springs mechanism feature obviously in the appearance, they own the almost same distance between each coil, which makes it zero friction and nearly linear counterbalance torsion when exerting rotation torque less than 360 degrees, once surpass 360 degrees rotation, the coils begin to be closed and the torque will burst in a short time.


This feature of almost linear torsion can be wildly used in many applications, like timers, brush motors, clocks, toys, and so on.

spiral torsion springs application

YongSheng has been manufacturing springs for more than 18 years, has rich experience and a strong R&D team makes us can easily handle all kinds of applications, and customize them for you not just from the material, but also length, thickness, width, inner diameter, and outer diameter. We will always listen to your ideas and give our professional suggestions.

With 18 sets of special forming machinery at hand, Yongsheng can produce 6,000,000 pcs flat wound springs every month. You will never feel anxious about spring’s stockout in the peak season. With thousands of tools in hand, we can provide clients with favorable prices and shorter lead times.

spiral torsion springs

in the below table, you can find several standard types of spiral torsion springs (standard tools that don’t need to open mold), choose your types, and you will get a good price.

if can’t find your ideal type, it doesn’t matter, please feel free to inquire about our expert to custom your idea products.

Part NumberT(mm)W(mm)L(mm)Min. Torque(N.mm)Max. Torque(N.mm)TurnsArbor size(mm)O.D(mm)

T is thickness, W is width, L is length, and O.D is the outer diameter. Normally, if you want us to produce a new style of spiral torsion spring, we need to know this information like thickness, width, O.D size, and Arbor size.

Meanwhile, if you want to design a new style of spiral torsion spring in your application, it’s better to tell the case size and shaft size besides the application, our engineer can assist you to design the CAD drawing based on this information.

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Why Yongsheng spiral torsion springs

YongSheng spiral torsion spring is made of flat high yield 301 stainless steel, which owns many excellent features like high hardness, anti-rust, high resistance, and so on. When it is shaped through the springs forming machines, it will be coiled and counterbalance the uncoiling.


Yongsheng has fabricated a variety of spiral torsion springs since 2002, you can customize the spiral torsion springs cover width from 2-55mm, thickness from 0.06-0.6mm. Yongsheng is your partner and is willing to explore more applications of spiral torsion springs together.

Yongsheng has a large springs manufacturing capacity. With over 18 sets of special springs forming machinery, we can produce over 6,000,000 pcs each month, so you will always have enough spiral torsion springs even in peak season.


You can customize your retractable gadgets with our’s tailored service(medical, automotive). we can design, manufacturing, assembly, testing your gadgets. assisting you to modify, updating, testing with no time limit until meeting your needs. Yongsheng is not just a springs’ supplier, but also your reliable partner.


For various sakes, we need to calculate the torque force of spiral torsion spring.

YongSheng has listed the formula of spiral torsion spring’s torque force in below, it’s better for understanding to refer to the above illustration. note: the ∅ value normally is less than 360 degrees when we use it.

M=πEwt³∅ /6L (N·mm)

E= modulus of elasticity (MPa)
∅= angular deflection in revolutions
L= Length of active material (mm)
M= torque force (N·mm)
W= Material width (mm)
t= Material thickness (mm)

Before making a spiral torsion spring, it’s better to make it clear where we will use this spring, the different applications will require different specs, and it will determine some parameters like the material width, length, thickness, inner diameter, outer diameter, and so on.

After affirming the applications, we will select the suitable raw material, and adjust the program of the automated digital control forming machine, and the springs will be shaped through this machine.

As for the torsion force, we can get it through the spiral torsion springs calculator.

Thickness, width, inner dimension, outer dimension all are the parameter.

For your information, https://www.allrite.com/clock-spring-calculator.html

This website is the easiest way to custom the specs of your spiral torsion spring by visually inputting your requirement,
our engineer also uses this calculator to design the spiral torsion springs.

Flat spiral torsion spring also called the spiral torsion spring, clock spring, flat torsion spring, it is made of stainless steel strip, and through the special digital control forming machine to forming, and people usually use the feature of linear rotational force to realize some functions.

Based on the special feature of almost linear rotational force, the spiral torsion spring are wildly used in timer, brush motor, automotive interior, and some medical equipment.

With less than 360 degrees rotational torque, it’s very ideal for clock mechanisms and some toys applications.

Refer to the video, spiral torsion springs for the clock mechanism.

When we mount the spiral torsion spring into the housing or shaft. It can generate constant counterbalance once we exert rotational torque, and the flat wound coils will be generally compacted as the exet rotational torque continues. This constant counterbalance will be continued unless the rotational torque is over 360 degrees, this special feature makes it very fit for some applications like motor brushes, timers, etc.

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