Located just outside Chicago

Single & Double Torsion Spring Design Resources

The section below gives some technical advice on torsion spring design, such as: how to specify leg position and load requirements, common torsion leg configurations, and wire diameter sizes that we can form into large or small torsion springs.

Custom Torsion Spring Design

We help OEM engineers with their torsion springs

At Master Spring, we’ve been manufacturing custom torsion springs for OEMs for more than 70 years. Learn more about how we can design and manufacture the torsion springs for your next application by calling us at 708-453-2570 today.

Learn more about custom torsion spring design and prototyping services.


Helical Torsion Springs

Torsion Spring Load and Deflection Requirements

The diagram to the right shows how to specify leg position and corresponding load requirements for a torsion spring.

Load and deflection requirements for torsion springs include:

  • L1 = Length of the moment arm of the first end.
  • L2 = Length of the moment arm of the second end.
  • P   = Load at installed position or load at final position.

Load and deflection requirements for torsion springs include:

Load and Deflection Requirements for Torsion Springs

Torsion Spring Wire Diameter

Whatever your design, size and tolerance needs, Master Spring has the torsion spring manufacturing capabilities to match. We have a wide range of CNC spring forming machines that can manufacturer custom torsion springs with wire diameters as small as 0.010” or as large as 0.250” (0.25 mm to 6.4 mm) and any size wire in between.

Single and Double Torsion Spring Materials

We manufacture custom torsion springs from all types of material. The most common material types for torsion springs are music wire, stainless steel (type 302, type 316 and type 17-7 PH), and hard drawn.
With our diverse selection of springs and wire forms and our industry expertise, you can count on us to design and manufacture a torsion spring to match your exacting needs.

Common Torsion Spring Materials Include:

  • High Carbon Spring Wire
  • Carbon and Alloy Wire
  • Hard Drawn Wire
  • Alloy Steel Wire
  • Stainless Steel Wire
  • Non-ferrous Alloy Wire
  • And Many More!

You can learn about the suitable uses of each material type in the Properties of Materials chart.


End or Leg Configurations of Torsion Springs

Some of the more common end configurations for helical torsion springs are shown below in SMI’s figure of Common Helical Torsion Spring End Configurations.

Types of Torsion Spring Configurations
Double Torsion Design

Recommended Way to Design Double Torsion Springs

A Double Torsion Spring should be coiled out from the center rather than in from the ends, allowing both ends of the double spring to work together and provide unique torque for many different types of applications. The recommended way to design a double torsion spring is shown on the left side of the diagram to the right.

Custom Torsion Springs: Specification Checklist

Specify the critical dimensions of your torsion spring

What information does Master Spring need to quote your torsion spring?  Download the checklist to make sure you specify the critical dimensions of your custom torsion springs.  For help with your torsion spring design, please call us at 708-453-2570.

Download the Torsion Spring Checklist.

The torsion spring checklist includes:

  • Material (such as Music Wire or Stainless Steel 302)
  • Diameter of hole that spring works in
  • Diameter of shaft that spring works over
  • Torque at a specified amount of deflection
  • Axial space available
  • Coil direction
  • Maximum wound position

Master Spring has been manufacturing single and double torsion springs for OEMs since 1945.  Request a quote today for torsion springs engineered to meet your requirements.


Download the Torsion Spring Checklist (PDF)



Torsion Springs Video Gallery

Our single and double helical torsion springs are manufactured to your print. Master Spring and Wire Form has been manufacturing custom torsion springs for a variety of applications for over 70 years.

We specialize in supplying OEMs their requirements of medium to high quantities of springs and wire forms. Browse our gallery of torsion springs or visit the custom torsion spring product page to learn about our capabilities.


A Torsion Spring Success Story

Manufacturing Springs for Commercial Lighting

At Master Spring and Wire Form, we take great pride in working with OEM engineers to improve their products by improving their spring and wire form components – and we think that this double torsion spring for commercial lights is a great example of that expertise.



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    © Master Spring and Wire Form Co.

    1340 Ardmore Ave., Itasca, IL 60143

    Phone: 708.453.2570 | Fax: 708-453-6420