Torsion Spring

Wide Variety of Standard & Custom Torsion Springs

Torsion springs are helical springs that exert a rotary force. The ends of a these springs are connected to other components. As the components start to rotate around the center of the spring, the torsion spring exerts an equal force to push them back to their initial position. These springs are subjected to bending stress instead of torsional stress, and are capable of storing and releasing angular energy. They can hold a mechanism in place statically by deflecting the legs by the center-line axis of its body. HSI provides regular custom torsion springs, as well as heavy duty torsion springs to suit your design requirements.


Following are the specifications of torsion springs:

Length of Legs up to 24 in up to 609.6 mm
Wire Size 0.004 to 1 in 0.1 to 25.4 mm
Direction of Winding Right Hand Left Hand
Material Beryllium Copper Music Wire
Inconel Chrome Silicon
Chromium Vanadium Phosphor Bronze
Stainless Steel 302 Stainless Steel 304
Stainless Steel 316
Finish Plain Black Oxide
Painted Cadmium
Passivate Zinc Gold
Zinc Silver


Here are some of the parameters of torsion springs:

  • Outer Diameter: The outer diameter of the spring is specified when it is required to fit into a circular hole with enough exterior clearance for operating freely. It is also specified in case of any outer housing clearance issues.
  • Inner Diameter: The inner diameter of the spring is specified if the spring is required to slip over a mandrel with necessary clearance for operating freely.
  • Spring Length: The spring length is the length of a spring coil.
  • Wire Diameter: Wire diameter is the diameter of a spring wire.

Performance factors:

  • Spring Rate: Spring rate is the angular return torque provided per unit of angular displacement.
  • Maximum Deflection: Maximum deflection is the maximum rated angular deflection of spring before damage.
  • Wind Specifications: The wind of the spring can be right hand, left hand, or double torsion.
  • Left Hand Wind: Wound in a left-hand configuration.
  • Right Hand Wind: Wound in a right-hand configuration.
  • Double Torsion Wind: It refers to one left hand and one right hand wind on the same spring, typically with the unwound section in between the winds. The two legs of the spring are on the same side.


Our helical torsion springs are designed for rotary actuation. These springs provide an angular return force too. These springs are offered in various leg configurations, which enable their attachment in different ways. The leg specifications to consider for torsion springs include leg end style, leg angle, and equal leg length.

Helical torsion springs that are parallel or straight on the same side have 0° leg angle, and their angle increases in the direction of unwinding. Some of the leading leg end styles include the following:

  • Straight Torsion
  • Straight Offset
  • Hinged
  • Short Hook Ends

Torsion springs can be hooked, bent, twisted, and looped to meet your application requirements. We provide torsion springs in a choice of 360°, 300°, 270°, 210°, 180°, 120°, 90°, and free leg position.

Benefits of Torsion Springs:

Some of the major benefits of these springs are as follows:

  • Durable
  • Easy to adjust
  • Relatively small
  • Great automatic levelling


These types of springs are commonly used in:

  • Clothes pins
  • Clipboards
  • Swing-down tailgates
  • Garage doors
  • Hinges
  • Counterbalances
  • Lever return applications

At HSI, we make sure to fulfill our clients’ industrial requirements on time. We provide competitive price benefits on all our products. To know more about our standard and custom torsion springs or other industrial springs in our selection, please contact us at the earliest. You can mail us your requirements for open wound compression springs at

Dobule Torsion Spring

Precision Engineered Double Torsion Springs to Customers’ Specifications

Torsion springs are the special type of springs that strongly resist rotational forces known as torque. Double torsion springs feature a left-hand and right-hand coil section that are connected together. The left and right hand sections are designed separately, and the total torque exerted is calculated as the sum of two. HSI is a leading double torsion springs manufacturer and supplier in the US. Our springs are known for their quality, reliability, and durability.


End Types Bent Hooked Twisted
Material Silicon Chrome High and Low Carbon Steel Nickel Plated Carbon Steel
Stainless Steel Beryllium-Copper Non-Ferrous Metals
Elgiloy Mild Steel Hastelalloy
Monel Inconel Titanium
Finish Plain Black Oxide Painted
Cadmium Passivate Zinc Gold
Zinc Silver

Feature Highlights of Custom Double Torsion Springs

Double torsion springs are used in a variety of applications. The spring’s reaction to the external torque will depend on its design. With excellent designing skills and manufacturing capabilities, we at HSI can design these springs to match your specifications. For example, we can design these springs in different configurations.

Being one of the dedicated double torsion springs manufacturers, we would request our clients to supply us the following information to begin with the design:

  • Dimensions: This will include inner diameter, outer diameter, spring length, and wire diameter.
  • End Styles: It is important to specify end styles 1 and 2.
  • Wind Direction: The spring should be loosely or closely wound.
  • Total Coils: The torsion springs having less than 3 coils are not recommended. It is best to specify the coils in the nearest fraction of quarters or eights.
  • Arm Lengths: It is always better to include lengths of both arms, as well as the length of the moving arm.
  • Spring Material: You can select the material from the list.
  • Torque: It is better to mention torque 1 and torque 2.
  • Applications: The mention of purpose will help us design the spring perfectly.
  • Winding: The winding can be right hand or left hand.

We provide short turnaround times in the industry. All our products are provided at competitive prices. We provide excellent bulk price benefits on all orders. To know more about standard and custom double torsion springs or trade enquiries, please contact us at the earliest. You can mail us your requirements for open wound compression springs at

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