Tension springs: precise force for demanding applications

Tension springs are critical types used in a wide range of industrial and mechanical applications. When stretched, they store energy and release it as they return to their original shape. This type of spring is especially useful in systems where a constant and controlled return force is required.

If you work in machinery design, industrial engineering, or product development, understanding how tension springs work and their advantages can significantly impact the performance and reliability of your solutions.

What are tension springs?

Tension springs are designed to operate under pulling forces. In other words, they are activated when the components attached to their ends move apart. They are typically made from high-performance steel, stainless steel, or special alloys that provide excellent fatigue resistance and withstand harsh environments.

Unlike compression springs, which are compressed under load, tension springs work oppositely: they stretch and generate a force that pulls back toward their original state.

Key features    

These springs usually include hooks or loops on their ends to allow easy attachment. Some of their main features include:

• Defined spring constant
• High resistance to repeated stretching cycles
• Adaptability to different lengths and forces

They can also be customized in length, diameter, hook shape, coil pitch, and surface treatment.

Applications

Tension springs are used across a wide range of industrial and consumer sectors. Common applications include:

• Automatic doors and closing systems
• Return mechanisms in pedals or levers
• Brake and clutch systems
• Fitness equipment and agricultural machinery
• Home appliances (washing machines, vacuum cleaners, etc.)

Wherever a smooth, constant, and predictable return motion is needed, tension springs are the ideal solution.

How to choose the right spring

Selecting the right spring involves taking several factors into account:

• Required pulling force
• Free and extended length
• Expected operating cycles
• Materials compatible with the working environment

Incorrect calculations can lead to premature failure or inefficiency in the system. That's why working with suppliers who can guide you and help design a component tailored to your specific needs is essential.

Custom manufacturing

At RPK Group, we manufacture high-precision tension springs for a wide range of industries. Our technical team works closely with you to define exactly the type of spring you need, optimizing its design to deliver the best possible performance under your real operating conditions.

If you’re looking for reliability, durability, and custom manufacturing, count on us. Contact us and we’ll review your project with no obligation.