Original Specification Entex™ Stock Springs

Original Entex™ Specification:

Entex™ Tension Springs

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Tension Springs Diagram

Outside Diameter

Material

Pull - Pull Length

Reset
Stock Code Material Outside Diameter (mm) Wire Diameter (mm) Rate N/mm Pull to Pull Length (mm) Initial Tension N Maximum Extension (mm) More Details
3500 CS 1.57 0.15 0.08 6.35 0.1 9.85 View Product
3502 CS 1.57 0.2 0.36 6.35 0.29 4.36 View Product
3504 CS 1.57 0.25 1.19 6.35 0.57 2.32 View Product
3506 CS 1.57 0.15 0.05 7.95 0.1 13.95 View Product
3508 CS 1.57 0.2 0.25 7.95 0.29 6.29 View Product
3510 CS 1.57 0.25 0.85 7.95 0.57 3.25 View Product
3512 CS 1.57 0.15 0.04 9.53 0.1 18.05 View Product
3514 CS 1.57 0.2 0.19 9.53 0.29 8.23 View Product
3516 CS 1.57 0.25 0.64 9.53 0.57 4.33 View Product
3518 CS 1.57 0.15 0.03 11.13 0.1 22.56 View Product
3520 CS 1.57 0.2 0.16 11.13 0.29 10.17 View Product
3522 CS 1.57 0.25 0.53 11.13 0.57 5.26 View Product
3524 CS 1.57 0.15 0.03 12.7 0.1 26.67 View Product
3526 CS 1.57 0.2 0.13 12.7 0.29 11.86 View Product
3528 CS 1.57 0.25 0.45 12.7 0.57 6.18 View Product
3530 CS 2.39 0.2 0.06 9.53 0.14 19.13 View Product
3532 CS 2.39 0.25 0.2 9.53 0.32 10.46 View Product
3534 CS 2.39 0.3 0.53 9.53 0.64 6.27 View Product
3536 CS 2.39 0.2 0.05 11.13 0.14 25.02 View Product
3538 CS 2.39 0.25 0.15 11.13 0.32 13.95 View Product
3540 CS 2.39 0.3 0.41 11.13 0.64 8.01 View Product
3542 CS 2.39 0.2 0.04 12.7 0.14 30.9 View Product
3544 CS 2.39 0.25 0.12 12.7 0.32 16.94 View Product
3546 CS 2.39 0.3 0.33 12.7 0.64 10.1 View Product
3548 CS 2.39 0.2 0.03 15.88 0.14 41.94 View Product
3550 CS 2.39 0.25 0.09 15.88 0.32 22.91 View Product
3552 CS 2.39 0.3 0.24 15.88 0.64 13.59 View Product
3554 CS 2.39 0.2 0.02 19.05 0.14 53.71 View Product
3556 CS 2.39 0.25 0.07 19.05 0.32 29.39 View Product
3558 CS 2.39 0.3 0.19 19.05 0.64 17.07 View Product
2000 SS 3.18 0.36 0.31 12.7 0.67 13.72 View Product
2001 SS 3.18 0.46 1.17 12.7 2.31 7.37 View Product
2002 SS 3.18 0.36 0.16 19.05 0.67 25.91 View Product
2003 SS 3.18 0.46 0.63 19.05 1.73 13.72 View Product
2004 SS 3.18 0.36 0.11 25.4 0.67 38.61 View Product
2005 SS 3.18 0.46 0.43 25.4 1.69 20.07 View Product
2006 SS 3.18 0.36 0.08 31.75 0.67 50.55 View Product
2007 SS 3.18 0.46 0.32 31.75 1.69 26.42 View Product
2008 SS 3.18 0.36 0.07 38.1 0.67 64.01 View Product
2009 SS 3.18 0.46 0.26 38.1 1.73 34.04 View Product
3560 CS 3.18 0.25 0.06 12.7 0.19 29.13 View Product
3562 CS 3.18 0.3 0.16 12.7 0.38 17.45 View Product
3564 CS 3.18 0.41 0.71 12.7 1.14 8 View Product
3566 CS 3.18 0.25 0.04 15.88 0.19 41.62 View Product
3568 CS 3.18 0.3 0.11 15.88 0.38 25.79 View Product
3570 CS 3.18 0.41 0.49 15.88 1.14 11.56 View Product
3572 CS 3.18 0.51 1.66 15.88 2.27 5.94 View Product
3574 CS 3.18 0.25 0.03 19.05 0.19 55.14 View Product
3576 CS 3.18 0.3 0.08 19.05 0.38 33.37 View Product
3578 CS 3.18 0.41 0.37 19.05 1.14 15.11 View Product

Coil Springs Direct are the UK’s only supplier of Entex™ specification tension springs. Our commitment to quality and precision makes us the trusted choice for many industries seeking reliable solutions – whether you require tension springs for industrial, automotive or bespoke applications, we have you covered.

Why choose our tension springs?

Our tension springs are manufactured to original Entex™ stock specifications that meet the highest industry standards. Our tension springs are made from high quality stainless steel and carbon steel to ensure durability and resilience under various stress conditions. The precision engineering of our tension springs guarantees optimal performance and longevity.

Key features

 

Industries we serve

Coil Springs Direct serves various industries with our premium tension springs, including:

 

Understanding Tension Springs in Dynamic Systems

Tension springs are essential components in systems where controlled resistance and return force are required. They store energy when extended and release it to pull components back into their original position, making them ideal for applications like garage doors, trampolines and mechanical levers. Their reliability and versatility have made them a staple in both light and heavy-duty industries, offering consistent tension performance over time.

What Is a Spring Tensioner and When Is It Used?

A spring tensioner is a device that maintains consistent tension in a system by adjusting or absorbing movement over time. These are often paired with tension springs in conveyor belts, pulleys and industrial machinery where slack or vibration can impact performance. Using a spring tensioner alongside a correctly rated tension spring helps prevent wear, reduces maintenance needs and ensures smoother operation under varying loads.

Using a Tension Spring with Bolts for Custom Assemblies

When space or design requires a more secure setup, a tension spring with bolts can offer added stability and precision. These configurations are commonly used in adjustable assemblies, such as gates, hatches or equipment covers, where a bolted connection allows for a custom-fit solution. Whether you're working with standard or bespoke measurements, integrating bolts can increase anchoring strength without compromising the flexibility tension springs are known for.

 

How to choose the right tension spring

Selecting the right tension spring is crucial for the success of your project. Consider factors such as load requirements, environmental conditions, and application specifications. Our knowledgeable team is ready to assist you in choosing the perfect tension spring for your needs.

Contact Us for Custom Solutions

Have unique requirements? Our team specializes in providing custom tension springs tailored to your specific needs. Contact us today to discuss your project, and let us create the perfect solution for you.

Coil Springs Direct is your reliable partner for high quality tension springs. Explore our extensive catalogue or reach out for custom solutions, or reach out for custom solutions. Trust us for precision engineering, durability and exceptional performance in every tension spring.

 

Frequently Asked Questions

 

What is the purpose of a tension spring?

The purpose of a tension spring is to store energy and create resistance by pulling two components together. It operates under tensile force, extending when pulled and returning to its original shape when the force is released, ensuring a secure and controlled connection.

 

Do tension springs wear out?

Yes, tension springs can wear out over time due to constant stretching and relaxing, which may cause them to lose their elasticity. Factors such as excessive load, fatigue, and exposure to harsh environments can contribute to the deterioration of the spring's performance.

 

What is the difference between coil spring and tension spring?

A coil spring is a general term for any spring made from coiled wire, used to store energy and resist force in various applications, such as compression, tension, or torsion. A tension spring, specifically, is designed to withstand pulling forces and stretch to store energy, typically used in applications where components need to be pulled apart, like in garage doors or trampolines.