Torsion springs

Torsion springs are coiled springs that are designed to have a rotational motion that exerts a torque or force.

The ends (or legs) of a torsional spring are attached to other components within an application and when these components rotate, the centre of the spring stores the mechanical energy and forces the components back.

Our advanced infrastructure uniquely offers hot and cold coiling torsion spring facilities, establishing Lesjöfors Heavy Springs as the custom heavy duty torsion spring specialists.

What are heavy duty torsion springs?

Manufactured from larger wire sizes, our torsion springs can exert an exceptionally large amount of torque (due to the size of the wire) when a load/pressure is placed on the legs of the torsion spring.

Bespoke designed and manufactured to meet the needs of our customers, the ends of each torsion spring can be tailored to suit the application required.

How do torsion springs work?

The most common spring type when torque is required alongside a rotating movement, torsion springs must always be loaded in the direction of the spring wire, so that the spring body closes. 

Most applications need a right-hand wound torsion spring mounted on one side and a left one on the other. However, in some cases, these two springs can be combined into a double torsion spring, which has one right and one left-hand coiled spring body connected to each other.

Due to the nature of the torsion spring design, they can be used across applications that work either through a clockwise or counter-clockwise motion.

As the expert heavy duty torsion spring suppliers, our teams bespoke engineer the torque to fit the application required.

Types of torsion springs

Torque is introduced by the end fitting or leg form and each leg form has a different name, which in turn leads to different types of torsion spring names.

Designed to store and release angular energy, torsion springs are commonly used to hold objects in place or push them back to an original position. The most common types of torsion springs are:

Axial Torsion Spring

Double Torsion Spring

Tangential Torsion Spring

Radial Torsion Springs

Our customers use them across numerous industries and common functions such as:

Garage Doors

Hatches

Lift Gates

Man Hole Covers

Torsion spring manufacturing processes

As leading torsion spring manufacturers with a 170 year manufacturing legacy we have heavily invested in hot and cold coil wire forming facilities to meet the demands of our customers and fulfill the production requirements from our skilled workforce.

Advanced CNC coiling and grinding machines deliver quality, accuracy, the best production run rates and efficiencies across an extensive wire range.

In-line shot peening facilities improve components shelf life and fatigue performances

Large-scale, fully automated powder coat lines offer a zinc phosphate coating option in advance of powder coating, delivering 1000 hours of corrosive salt spray resistance.

Extensive training with industry specialists and through the Institute of Spring Technology, as well as through our own in-house training centres, ensures our team excel at the torsion spring manufacturing process.

Torsion spring materials

Material specifications are the same as for compression springs, covering a wide range from:

  • Carbon Spring Steel
  • Chrome Silicon
  • Chrome Vanadium
  • Stainless Steel
  • Nickel Alloys
  • Titanium Alloys
  • Copper Alloys

Stainless steel torsion springs are one of our most common torsion spring material requests from customers.

Our material scientists are on hand to discuss the environmental need and application of your coil spring and therefore the torsion spring material's disadvantages and advantages.

A very high yield type of material (able to withstand high amounts of stress and maximum load) is best suited for torsion springs and as stockists of the largest global supply of chrome silicon wire, we’re confident in our supply and range of material choices suited to your torsion spring material.

How to design a torsion spring?

Torsion spring design is often led by a force specification rather than a torque specification. The torque, needed to design the spring, can then be calculated by multiplying the force (F) by the length of the lever (leg end) that the force is acting on. Our experts master the maths, physics and manufacturing to deliver the measurables required for the application and are there to consult on the processes involved to ensure the outcome delivers and excels at the performance required.
They are also on hand to consult on other key elements that may affect your product, including:

How to calculate torsion spring force

Our engineers are available at all times to discuss and manage the measurements behind these calculations. Please feel free to contact us with any queries.

What are torsion springs used for?

From heavy duty clips to the tail gates of heavy plant machinery through to heavy-duty torsion springs for garage doors, our larger springs feature across a host of applications.

Torsion springs are also commonly found in clothes pins, clipboards and mousetraps, and this smaller wire manufacture is best suited to our colleagues within the Lesjöfors Group. Do have a look at the spring directory for all standard torsion spring supplies.

Torsion spring FAQs

How to measure a torsion spring?

Ensure your spring is completely ‘unwound’ before measuring the length as a torsion spring will be longer when installed and in use.

Using a digital vernier caliper, measure the spring wire diameter, then the outside diameter of the coils, count the number of coils and measure the dimensions of the leg length.

Our engineers would be happy to help you measure the helical coil diameter, maximum load, and leg angle and decide what material would best suit your spring. Please feel to contact our team for more information.

How to install a torsion spring?

Once we’ve designed, manufactured and dispatched your product, the install element is individual to need and we suggest you visit YouTube to discover hands-on applications of torsion spring installs.

Do you require a torsion spring? Get in touch and discover how we can help you. 

Contact us today

How do I order a bespoke spring?

Lesjöfors Heavy Springs offers a consultancy service to discuss your heavy spring specifications - where our team will assist you with your engineering queries. Explore our Heavy Duty Tension Spring and Compression Spring pages.

We are world-leading heavy spring manufacturers, delivering the greatest expertise in compression, torsion and tension spring manufacturing.

As market-leading solution providers, we specialise in spring components across multiple sectors, building the world’s infrastructure one spring at a time.

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