Die Spring Manufacturers

As expert spring manufacturers, customers from across the world choose our products for high-quality, dependable, and long-lasting results. With ISO 9001 certified processes and a team of experienced engineers, we supply stock and bespoke die springs to many industries.

Custom and Stock Die Springs

In our extensive spring catalogue, we have a wide range of standard springs that can be manufactured and delivered quickly. In the catalogue, you’ll find all that you need to know regarding technical information, tolerances, and materials, as well as our broad range of other spring types.

We also offer custom springs for more niche applications, where our team collaborate with you to produce an end result completely tailored to your needs.

Bespoke Die Springs

Custom die springs are often chosen for applications that have unique, specific demands. If you’re struggling to find what you need in our catalogue, our team can work with you to develop a custom solution. Here are some things we might consider when designing your springs:

  • Temperature, whether extremely high or extremely low.
  • Application, including whether space constraints are in place.
  • Load Type, such as excessively heavy or unique loads.
  • Strength, where we typically colour code the spring by strength type.
  • Closed or Open Ends, depending on the use.

If you’re not sure whether you need bespoke springs, please get in touch with our team.

Trusted Die Spring Suppliers

As a member of the world-renowned Lesjöfors group, we’re able to supply an extensive range of stock springs. We’ve developed a solid production process for our die springs, which includes:

  • Specialist Alloy: A specialist material with improved heat resistance and less relaxation. Most similar to EN 10089, a high-strength spring steel with an operating temperature range of -40 to +225 °C.
  • Low Surface Decarburisation: Making the surface free from defects.
  • Rectangular Profile: Allowing for a shorter solid length and subsequent increased deflection capacity.
  • High Stress Resistance: Leading to a longer lifespan, decreased load loss and greater strength.
  • Close Tolerances: So that your die springs can precisely fit into existing spaces.

For more technical information about our stock die springs, please consult pages 50-67 of our catalogue.

End-to-End Service & Support

When working with us, you’ll be supported at each stage, from initial CAD design right through to final quality assurance. Whether you need a one-off specialist prototype or a high-volume order, we’ll bring the same attention to detail and customer service.

To help your springs last longer, we offer surface treatments including plating, finishing, and heat treatment. If you need more than one type of spring, we’re also suppliers of coil springs, pressings, and wire forms.

If you have any questions, please do not hesitate to contact our die spring suppliers, who will be happy to provide you with the information you need.

Frequently asked questions

What Are Die Springs?

Die springs are strong concentrated hybrid versions of compression springs made with rectangular wire instead of their circular counterparts. They are also referred to as ‘high force compression springs‘ because they are specially designed to handle a great amount of environmental stress.

As high-force compression springs, a die spring can take a higher load when required, approximately 30% more than a standard compression spring. It can also handle temperatures up to 475 degrees. They also are engineered to give predetermined pressure at a given compression reliably and consistently.

In addition, they are designed to be loaded in excess to cover the requirements of perforating material, in some instances, metals.

Die springs have many applications across many key industries, including:

  • Machinery and Tools: Due to the consistent predetermined compressive force, they are perfect for punching and pressing machines.
  • Automotive: Die springs last excellently under heavy loads and are found within automotive applications such as clutches or brakes.
  • Agriculture: These springs are used in farm machinery and equipment requiring higher loads and a consistent level of pressure.
  • Oil & Gas: Drills in the oil and gas sector will often use die springs for their capabilities in providing high levels of force in small spaces.
  • Electronics: Found in circuit board manufacturing, as their controlled compression is essential for components like wires and circuits.

First, define the required lifetime, hole diameter, and total spring force. Check that the spring fits the available space by comparing hole diameter, shaft diameter, and unloaded length with the catalogue. Then choose the correct force class (L, 1–6) from the colour-coded series that matches your force and lifetime needs. Ensure the maximum deflection (s₃) is not exceeded and apply at least 5% preload of the unloaded length. Finally, confirm that operating conditions, including material limits and the 200 °C maximum working temperature, are suitable.

Die Spring Applications Across Different Industries

Here is an inclusive list of the main sectors and applications where Die Springs improve designs and make a positive difference.