Stanley Spring & Stamping Torsion Springs
Stanley Spring & Stamping is your one stop shop for all of your torsion spring design and production needs. Since opening our doors to the public in 1972, we have created the highest quality springs and metal stamping parts in the industry. We can produce outstanding torsion springs to your exacting standards and needs. Our springs have been successfully used in many products and numerous, diverse industries. We can produce in a variety of sizes, materials and thicknesses – all based on your unique specifications and application requirements.
Torsion springs are known as helical springs and are commonly made from carbon steel or stainless steel, in addition to other metals. The purpose of a torsion spring is to apply a rotational or torque force. The supporting ends of the springs jut out from the actual spring mechanism and are routinely attached to nearby pieces or components. When these adjoining parts (connected to the torsion spring) are rotated or moved from their resting position, it is the common torsion spring that exerts counter pressure on the part to return it back to its original placement. These are designed to exert a certain amount of resistance when a rotational or twisting force is exerted upon the coils. In addition, the principal of resistance still applies whether the spring is wound in a clockwise or counter clockwise orientation.
It is interesting to note that although ironically these types of products are called torsion springs, they actually operate under the principle of bending stress not torsional stress. A torsion spring can store and release angular energy and they can also keep components in place until the energy retained in the spring is removed or withdrawn.
A great majority of torsion springs produced have been designed in a close wind orientation. However, when there is an engineering concern about friction developing between the coils, the spring design can feature a pitch, which helps to reduce any concerns about friction building up within the coil structure.
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Industries & Applications
Torsion springs are found in many common, everyday devices as well as having commercial applications. Here is a partial list of the industries or devices that regularly use these springs.
For optimal performance, the load of a torsion spring should be orientated in the direction of the wind. When wound up, the body length of a torsion spring becomes longer, however its diameter is reduced. These characteristics should be taken into consideration when design space is in short supply in a given product or device.
Torsion Spring Configurations
Torsion Springs are engineered to have a rotational actuation and will provide an angular return- pressure force. As it relates to the design and characteristics of a spring’s legs, there are a variety of options available, since not all springs will attach the same way in every device. The attachment of the spring to the supporting structure can be accomplished in a number of ways. Here is what to consider when evaluating the specifications of torsion spring legs.
- Style of Leg Ends
- Degree of Angle
Torsion springs that have a straight or parallel on the same side design characteristics will have a zero-degree leg angle. Common leg end designs include.
- Short Hook End Design
- Straight Offset
- Longer Hood End Designs
- Straight Torsion
Stanley Spring and Stamping can produce the springs to be twisted, hooked, looped or bent to specifically suit your design needs. In addition, our torsion springs can be offered in the following degrees.
- A 360-degree free leg position can also be created if needed.
Double Torsion Spring Production
We are also able to produce double torsion springs. These products have many common characteristics with single torsion springs, however are unique in in some ways. Double torsion springs involve the use of two sets of coils, one being coiled with a right hand orientation and the other being coiled in a left handed direction. The two sets of coils are normally connected by an unwound piece in between the coils and work harmoniously in parallel. The total torque output of a double torsion spring is made up of the sum of the torque made by each individual coil wind.
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When designing and producing torsion spring products, the following measurements need to be taken into consideration.
- Inner Diameter
- Outer Diameter
- Spring Length
- Wire Diameter
- Length of Spring Legs
Spring diameter is a critical design element for the following reasons.
- The Inner Diameter must be precise in order to allow a spring to go over a mandrel with the proper amount of operational clearance.
- Outer Diameter must allow a spring to fit into a design cavity while still giving it proper clearance to freely function and clear outer housings.
- The spring length must be exacting to allow the spring coil and legs to fit in its designated spot in the device.
- Wire Diameter is the diameter of the coil wire itself and must be correct for the specific application.
- Spring Length is important to consider, as the legs must fit correctly into their supporting structures in order for the spring to operate as designed.
Torsion Spring Performance Characteristics
To ensure the proper functioning of either a single or double torsion spring, the following factors must align with the spring’s desired performance.
- Spring Rate – This is the angular return torque produced per angular displacement unit.
- Wind - Torsion spring wind orientations can be left handed, right handed or double torsion.
- Maximum Level of Deflection – This is the maximum angular deflection a torsion spring can withstand before failing or being damaged.
Stanley Spring and Stamping can produce your steel torsion springs in either English (Imperial) or metric units. Be sure to specify what unit of measurement you need for your application.
Torsion springs have so many uses and play an important role in the successful operation of many products and devices. Stanley Spring and Stamping is proud of the over four decades of experience we have in producing springs that have been a part of so many quality products.
Contact Stanley Spring and Stamping today for a quote and to learn more how we can custom make the highest quality products for your exact needs and specifications.
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