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Spring Profile: Torsion Springs

Overview:

Torsion springs are helically engineered springs that operate by exerting torque or a rotary action. They work by applying force to two objects, holding them in position. A torsion spring can statically hold an object closed by deflecting the spring legs across the centerline body axis. The torsion springs can also store and release angular energy.

Torsion Spring Characteristics

Torsion springs are designed to varying specifications of load, wind, deflection, spring rate and other properties. A number of considerations go into the engineering of torsion spring. Design details are determined by specific application requirements and factors such as:

  • Dimensional constraints
  • Rod usage
  • Body length
  • Leg bend and length
  • Deflection length
  • Required torque
  • Free length angle

Torsion Spring Materials and Finishes

Torsion spring design considerations also include whether or not a finish will be used, and if so, what type of finish will provide optimal performance for the application. When torsion springs are needed for corrosive environments, in which the spring will be exposed to harsh weather or moisture, stainless steel or another type of corrosion resistant metal will be used. If the conditions are especially demanding, however, an additional finish may be needed to provide optimal performance. A few finish options that are commonly used include black oxide, passivate, gold iridite, and zinc. When the spring is not well-suited or designed for the application torsion spring failure can occur. Corrosion or other steadily destructive forces can lead to serious problems. 

Torsion Spring Applications

Torsion springs are used in a diverse range of products and applications including:

  • Clothes Pins
  • Clocks
  • Automotive Assemblies
  • Medical Devices and Equipment
  • Door Hinges

In many cases, torsion springs are often used in equipment that involves large amounts of force. Sudden and unexpected failure can put nearby property, or worse yet, people at risk. For this reason, it is critical that the torsion spring design be appropriate for the job. The best way to assure you get the right torsion spring that will deliver performance, reliability, and safety is to choose a knowledgeable and experienced manufacturer. W.B. Jones has over 100 years’ experience providing quality torsion springs, both stock and custom to meet your needs.


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