A spiral torsion spring offers numerous benefits, but its design is the key factor that makes it so effective across many applications. These springs are relatively small and flat, making them the ultimate space savers.
While manufacturing the spring, a concentric spiral forms. This spiral allows the spiral torsion to be compact and creates a unique helical design. Due to the design, the spring can rotate in both directions with a “return to center.” This small component envelope makes the spiral torsion spring a great fit for many high-intensity and space-conscious designs.
Versatility in Application
The variety of small and large spiral torsion spring applications across industries indicates their versatility. Common markets and applications for these springs include the following:
Aerospace and Defense
Flight control systems, satellite systems, landing gear, jet stairways, armored hatch covers, and primary or cargo doors
Automotive
Braking systems, stabilizer bars, suspension control arms, clutch mechanisms, and trailer tarp systems
Consumer Goods
Watches, mechanical clocks, children’s toys, and sporting goods
Clamps, forceps, retractors, diagnostic or surgical tools, implants, and dental X-ray head units
Industrial Equipment
Automated assembly lines, robots and robotic joints, and packaging systems
Specialty Applications
Damper and valve actuation, motor brush assemblies, and electric motors
Within these components, equipment, and systems, spiral torsion springs effectively store and release the rotational energy necessary to generate motion, resulting in controlled torque, reduced stress and torque loss, consistent and reliable performance, and enhanced durability and longevity of a product.
Spiral torsion springs are useful for motion applications in which short rotations under 360° are necessary, or those requiring torque that need short rotation, most typically one rotation or less.
Spiral Torsion Spring Benefits
The linear relationship between deflection and the resulting torque in spiral torsion springs allows for precise control. These springs store and release energy by applying rotational force, making them highly effective and versatile. Their unique design offers several benefits, making them suitable for a wide range of applications.
These applications include:
Compact and efficient energy storage
Compared to traditional compression springs, spiral torsion springs are capable of storing more energy while fitting into smaller, more compact spaces. These compact springs provide an ideal fit in applications with space restrictions.
High torque with minimal rotation
Delivering impressive torque through rotations that are typically less than 360°, spiral torsion springs are well suited to tasks that necessitate high rotational force but minimal motion.
Durability and longevity
Spiral torsion springs hold up well against repetitive twisting and untwisting movements, helping avoid premature fatigue failure in your equipment for long-lasting performance. This reliable durability also lends them the advantage of being a cost-effective choice for cross-industry applications.
Versatility and customizability
The versatility of spiral torsion springs allows them to be tailored to meet specific requirements. They are highly customizable to fit the needs of a range of projects. You can select the material composition, outer and inner diameters, and amount of coils in the design to best suit your unique needs. Last, they offer flexibility in mounting options using:
L hubs or collet
Hooks and pins or slot-mounts
Tabs and keyways
Hinged or clamped for free or restricted movement
Lower torque loss and stress
The design of the spiral torsion spring accounts for its ability to lower stress on your equipment and reduce torque loss for more consistent functionality. This dependability is beneficial for critical or otherwise demanding applications.
Ease of integration and adjustment
Integrated effortlessly into various systems, spiral torsion springs with their compact size and customizability can be adjusted for different applications. They are easily incorporated into new or existing mechanical systems.
Need Spiral Torsion Springs for Your Next Project?
Partnering with a trusted manufacturer is crucial in receiving well-designed, high-quality spiral torsion springs for your application. At John Evans’ Sons LLC, we’re industry leaders in powerful, custom-made springs and spring-based assemblies. For a customer base that includes the aerospace, robotics, medical, trucking, and electric motor production sectors, we engineer and manufacture reliable products from stainless and carbon steel or specialty alloys to deliver the required torque while minimizing rotation.
Contact John Evans’ Sons
If you’re ready to take the next step, John Evans’ Sons can help, with expert advice on your spiral torsion spring applications. Request a quote today, or contact us to learn more about our full range of in-house capabilities.
On July 23, 2024, Sam Davey Co-President of John Evans’ Sons LLC visited Montgomery County Intermediate Unit (MCIU) with the John Evans’ team. They took this opportunity to express their gratitude to the students for their dedicated work and discuss the impact of their contributions. John Evans’ Sons, a leading manufacturer recognized for its innovative window balance systems, is a long-time supporter of MCIU’s extended school year transition program.
The Montgomery County Intermediate Unit was established by the Pennsylvania Legislature in 1971 to aid local school districts.
MCIU Mission:
“The Montgomery County Intermediate Unit, a dynamic educational service agency, provides visionary leadership, impactful services, and strategic solutions that maximize access and opportunities for all learners.”
MCIU provides special services through cooperation and collaboration among schools and community agencies. These services result in innovative, responsive, and cost-effective programs. Offering direct and indirect support to more than two million students and nearly 147,000 school professional staff in Pennsylvania.
Extended School Year
Due to the remarkable work of MCIU, John Evans’ Sons takes pride in providing them with continuous support. The ESY program maintains and strengthens transition skills over the summer to enhance personal and social independence. Through the transition program for ESY, each student develops appropriate social skills, career acquisition skills, and career retention skills.
A Day of Recognition and Learning
A Day of Recognition and Learning
As part of MCIU’s transition program, these hardworking students have demonstrated remarkable precision and a quality-oriented mindset by assembling shoes and cams for window balance systems. At the visit, they had the opportunity to meet the people behind the products they assembled, ask questions, and discuss their experiences. The ability to assemble shoes and cams requires dedication, attention to detail, patience, and care. After transitioning from MCIU, these skills will be crucial in achieving independence, succeeding in the workplace, and fostering self-pride.
The Importance of Their Work
The John Evans’ team first shared a comprehensive overview of the significance of the students’ efforts because of the tremendous impact they have. Then, it highlighted how these components are crucial for window functionality in homes across the Caribbean to Canada. Last, members demonstrated the role of the cam, engaging and pushing the top guide of the window balance, which is then moved along with the window.
This visit wasn’t just about recognizing the students’ contributions. It was an educational experience that connected classroom knowledge with real-world applications. They learned firsthand how their work fits into a larger picture. The skills they learned assembling, working together, and independence are something they can take satisfaction in. This group showed great attention to detail and quality work, they did an amazing job they can be proud of.
A Bright Future of Collaboration
Above all, the visit from John Evans’ Sons highlighted the power of community collaboration. By working together, businesses and educational institutions can create enriching experiences that benefit both students and companies. The gratitude expressed by John Evans’ Sons underscores the importance and impact of the students’ hard work.
As the visit concluded, there was a shared excitement for future support. Both, John Evans’ Sons and MCIU, look forward to continuing their partnership, providing students with valuable opportunities to learn and grow through practical experiences.
For engineers designing new products, procuring specialized components for the device remains a consistent hurdle. Numerous industries, from automotive and aerospace to medical and construction, need custom-made springs for specialized applications.
Stock springs can be ideal for short-turn-around times, but they aren’t made to suit your device’s specifications. To this end, a custom spring manufacturer can be a vital solution for industrial engineers. Learn more about some of the benefits of partnering with a custom spring manufacturer.
Design Expertise
Using stock springs can mean having to settle for approximations of what you need. However, custom springs can be made to match the specifications required for your device.
A custom spring manufacturer brings extensive knowledge of different types of springs to your project, including how to fabricate components to fit product requirements or specifications.
Your company can also reduce other costs, such as labor or equipment when you partner with a custom manufacturer with design engineering expertise. John Evans’ Sons provides in-house tooling and engineering assistance, allowing our clients to focus on what they excel in without having to divide labor and resources.
If you need to alter the design of your product for any reason, the manufacturer might be slow to change the components they’re providing you with. Similarly, bulk orders from manufacturers that deal in more standardized parts can leave you with excess inventory if what you ordered doesn’t suit you.
A custom spring manufacturer shortens the turn-around time associated with orders and revisions. They can also maintain tighter control over the supply chain. If the components you order need to be adjusted, a custom manufacturer can more immediately make those adjustments. This gives you better flexibility to experiment with designs and make adjustments for product recalls or industry changes.
Lower Production Costs
Manufacturing partners with their own in-house tooling capabilities are often equipped to fulfill large custom orders. This stems from not only their specialized manufacturing technology but also the reduction of costs associated with shipping and handling parts. You also avoid the overhead costs of labor, manufacturing equipment, and raw materials.
Choosing to partner with a custom spring manufacturer doesn’t sacrifice scalability, either. The benefits of this partnership aren’t limited to bulk orders for large companies or already-established devices. For prototypes and new products, custom can be a cost-saving option.
Quality Assurance and Control
Quality assurance and control are key, especially for custom products. Standardized manufacturers can’t always match your design specifications and may have less control over quality.
However, the advanced CNC machining technology used to manufacture custom components enables stronger quality assurance. Not only can you order exactly what you need, you know you are getting a consistent product that meets your specifications.
Cost, lead time, and other factors may determine if you need a stock or custom spring; however, a custom manufacturer may serve as a better partner over the long term.
John Evans’ Sons sales and design engineering teams are here to help you through every phase of your project. Our custom design capabilities allow us to serve companies in a variety of applications, including defense, aerospace, and medical. Tell us about your project requirements, and our experts will determine what spring(s) or assembly you need.
Springs are manufactured with different materials and finishes based on factors such as application, project requirements, and operating environments. Spring quality is crucial, and material or finish can have an impact on performance.
With so many materials on the market, here is what you need to know about choosing the best spring materials for your device or application.
Common Spring Materials
Springs are most commonly made of steel alloys because of their cost, availability and durability. The most common alloy types include music wire, chrome silicon, stainless steel and oil-tempered wire. Learn more about some common spring materials.
High-Carbon Steel
Hard-drawn wire: Hard-drawn wire is often considered the most economical steel wire available. It is sturdy, versatile and easy to use. While hard-drawn wire will not work well in temperatures beyond 250°F, it performs well in most other working conditions. Hard-drawn wire would not typically be recommended for applications that require a long life, such as medical devices.
Music wire: Music wire is durable and works well in various applications. Music wire is used in many heavy-duty industries such as construction and automotive repair, where durability is an essential factor. These springs are a good choice because they can handle heavy loads while retaining their build and form.
Oil-tempered wire: Oil-tempered wire is ideal for applications that require heavy lifting consistently. It is an excellent choice for farm equipment and automotive machinery, partly because of its large diameter.
Alloy Steel
Springs made from chrome silicon wire are sturdy and have a high degree of malleable strength. Chrome silicon is a good choice for applications that have high-impact requirements or need to perform high-pressure tasks repeatedly. This spring material works well in most work environments but can break down in extreme temperatures.
Nickel Alloy
Inconel alloys are an excellent choice in extreme environments, particularly high-temperature atmospheres. This material is common in the aerospace and nuclear energy industries.
Stainless Steel
Grade 301 stainless steel: Many standard spring charts, including our constant force spring charts, are based on 301 stainless steel. It is corrosion-resistant in many environments.
Grade 302 stainless steel: Many stock commercial springs use 302 stainless steel. This material has a higher resistance to corrosion than 301 because it contains more nickel. 302 stainless steel can withstand high temperatures, up to 550°F. Generally, stainless steel is good for medical applications.
This is not a comprehensive list of all spring materials available. What material you need should depend on your project requirements.
What Factors Are Important in Selecting Spring Materials?
Corrosion resistance: Corrosion can have a massive impact on the durability, performance, and longevity of the spring. Corrosion often manifests itself in the form of rust on springs made from steel, which impacts the strength of the metal. Spring failure is common in springs affected by corrosion. Copper-based alloys and stainless steel are good choices because of their corrosion resistance.
Environmental factors: Design engineers should account for environmental factors that can impact the spring’s performance. Factors to consider include humidity levels, average operating temperatures, and operating environment. Designers should also assess the prevalence of vibrations in the working setting, as vibrations can damage springs. Operators may need to adjust the spring material, size, or position based on these various factors.
Affordability: Hard-drawn wires are affordable but may not be appropriate for high-pressure operating environments. Choosing a high-quality, durable material is an investment that will likely pay off in the future.
Other factors to consider include elastic deformation, tensile strength, and electric conductivity. Designers should consider all of these factors when choosing the best material and finish for their application.
Need help choosing the right material for your spring? John Evans’ Sons has a design engineering team that can help you with important considerations such as material.
We specialize in providing springs for a variety of industries including military, aerospace, and medical devices. Tell us about your project, and our experts will help determine what you need.
When you think of a spring, what first comes to mind is probably a helically wound spring consisting of a coiled wire of a given diameter. Constant force springs look a little different in that they typically consist of flat metal strips that have been pre-tensioned.
Manufacturers can coil constant force springs with the same equipment as helix springs with just a few small changes to the machinery. Once the strip material, initial load, and inside and outside diameters are determined, the mounting method should also be considered.
What is Mounting?
Mounting is where and how the spring will be placed to perform its designated function. At first glance, a constant force spring looks like it is made to naturally fit on a spool. While it can certainly rest around a spool, that is not always required for this type of spring to do its job. Where and how you choose to mount the spring ultimately depends on the application or device and what you need the spring to do in the design.
There are a lot of considerations when selecting a method for mounting in order to get the most use out of a spring. The design should take into account how far the spring needs to extend and how to keep it from twisting or kinking. Some mounts work better for tighter spaces while different ones are necessary for longer extension requirements.
It is important to select the correct method based on the type of load that you need the spring to handle. Failure to consider mounting methods in the design process could have implications on your project cost and lead time.
There are a variety of mounting methods to consider, but some of the most typical options for a constant force spring include back-to-back, tandem, laminar, and cavity.
This is one of the more stable mounting options where two springs are mounted back-to-back and unwind in opposing directions. This is a desirable configuration for applications requiring long extensions as it prevents twisting.
Tandem
This method involves placing one spring behind the other with some space between; however, it does not offer as much stability as other methods. This option may be a better choice when there is not enough room in the design for a back-to-back mounting.
Laminar
This method is a good option if you’re working within a limited space. It involves interwinding multiple springs together and takes up slightly more space than a single spring. For more force from shorter extensions, laminar may be the way to go.
Cavity
This method is the easiest to assemble because it does not require a bushing, but it also encounters the most friction during operation. The spring itself is mounted in a cavity, which then increases friction from the constant contact during movement unless additional considerations are implemented during the design process.
Mounting multiple springs together tends to provide greater force since the total force is equal to the sum of the springs.
Which Mounting Method is Right for Your Application?
Because constant force springs are used in many different ways, there is no single mounting method that will be ideal for every application.
If you are unsure which mounting method is right for your device, John Evans’ Sons can assist you. Our design engineers can explain different mounting methods and other technical considerations to ensure you get the constant force spring that you need.
NASA LAUNCHES MARS 2020 PERSEVERANCE ROVER JULY 30
Our Engineering Dept. & Sales Dept. have worked with NASA’s Jet Propulsion Laboratorysince September 2018 on this design. The springs were created in our Constant Force Dept.
Perseverancewill cruise through space for nearly seven months, aiming to land in Mars’s Jezero crater on February 18, 2021.
Physical facts:
2,260 pounds
10 ft. long, 9 ft. wide, 7 ft. tall
Plutonium-238 powered
Generates 110 watts of electricity plus two lithium-ion rechargeable batteries
Curiosity’s rover design served as the basis for NASA’s 2021 Perseverance mission. JPL, a division of Cal Tech, manages the Mars Science Laboratory project for NASA’s Science Mission Directorate, Washington.
Shock and vibration are common challenges for mechanical and electronic equipment. Conditions like loose components, misaligned shafts, device wear and tear, abrupt machine starts and stops, and imbalance created by heavy loads can cause vibration. Let’s not forget about external factors that can cause vibration, like explosive blasts or extreme weather.
Even the smallest shock can have an impact on device performance and life expectancy. Therefore, it’s important to address vibration challenges as early as possible to avoid repairs, field failures, and replacement costs.
The most efficient way to minimize the transfer of vibration is during the design engineering phase. When vibration is a concern, we’ll suggest helical vibration isolators (aka Cable Mounts) to our clients. Learn more about why we recommend helical vibration isolators.
Advantages of Helical Vibration Isolators
Typically, a resilient element and a metallic supporting frame are used to manage shock absorption. Elastomer mounts are a common method due to their cost; they’re relatively inexpensive.
There are some disadvantages of elastomer mounts. They experience wear and tear over time with environmental exposure and use. Elastomer mounts typically don’t work well for heavy equipment. They aren’t effective against higher-magnitude physical shocks.
Helical vibration isolators or helical mounts, provide more shock protection than other isolation devices. While it is not possible to eliminate vibrations entirely, an isolator can diminish transmissibility.
Helical isolators offer the following advantages over other vibration solutions:
Operate in compression, shear, and roll assemblies.
Provide protection across all three axes simultaneously.
Can withstand extreme environments.
Require little or no maintenance.
Able to cushion a range of loads, up to thousands of pounds.
Industries with sensitive equipment, such as aerospace and medical, can especially benefit from vibration isolators. If your device falls within one of these applications or you frequently deal with shock and vibration problems, John Evans’ Sons helical vibration isolators may be an ideal solution.
Our helical isolators provide superior shock and vibration protection. We use aircraft-quality aluminum and stainless steel cable so they are able to resist corrosion and withstand extreme environments.
Selecting the right mechanical components for your application is crucial. Among the various options available, constant force springs stand out for their unique properties, versatility, and benefits. They are a type of extension spring that does not obey Hooke’s law, maintaining a constant force even when deflected. Let’s delve into the advantages of a constant force spring mechanism and why they might be the perfect choice for your application.
About Constant Force Springs
There are many constant force spring benefits due to their superior spring properties. In the form of a tightly wound roll of strip spring material,they are more compact and lighter than most other methods as a balancing mechanism. This eliminates the need for deadweights, linkages, cylinders, and other systems.
Constant Force Spring Benefits
Small Space Requirements
Their design allows tight coiling, making them an excellent choice for devices with limited space.
Smooth Range of Motion
The nearly flat force curve ensures a consistent force throughout their extension. This provides a smooth and reliable range of motion, essential for applications requiring precision and stability.
No Inertia to Overcome
Unlike traditional springs, they do not have significant inertia to overcome at the beginning of their movement. This makes them ideal for applications that require immediate and responsive action.
Versatile and easily integrated into existing hardware setups. This flexibility simplifies the design process and can reduce manufacturing time and costs.
Counterbalance Effect
Useful in applications where a constant load needs to be counterbalanced, such as in retractable mechanisms or adjustable systems.
Versatile Applications
Constant force spring benefits make them suitable for a wide range of applications, including:
Surgical Devices: Enhancing precision and control in medical instruments.
Aircraft Doors: Used in a “gang” arrangement, i.e. side by side in a multi-spring assembly. This allows for hundreds of pounds of counterbalance force to be available to assist in opening & closing the main entry door/stairs, or cargo doors.
Windows: Providing a counterbalance for smooth opening and closing operations.
Fire Dampers: Supply steady and consistent force, and well-suited for the certain opening and closing actions needed in fire dampers.
Gym Equipment: Replace the need for weights in gym equipment using the force of the springs to act the weight. 50 pounds of force in a lightweight spring is then 50 pounds of weight saved, making the equipment lightweight and more compact.
Electric Motors: The springs allow the motor to run efficiently without arcing or other gaps in power. As the commutator turns, the brushes become worn over time due to friction. The springs ensure proper contact force against the commutator as they wear.
Consider Constant Force Springs for Your Next Project
Considering these springs for your application? It’s important to work closely with a trusted manufacturer to ensure the best design and implementation. John Evans’ Sons, a leader in constant force spring manufacturing, offers extensive selection charts and technical information to help you choose the right spring for your needs.
We produce reliable, powerful springs and spring-based assemblies for industries including medical, aerospace, robotics, trucking, and window manufacturing. Our extensive in-house capabilities allow us to make various spring types and customized solutions to meet diverse needs.
Contact John Evans’ Sons
Already know what you need? Reach out to John Evans’ Sons for expert assistance in selecting and implementing the perfect constant force spring for your application. Their expertise and high-quality products can help ensure the success of your project.
Since 1850, John Evans’ Sons has manufactured springs for many unique devices and applications. We’ve manufactured suspension components for the Mars Rover Curiosity, counterbalancing mechanisms for M1A1 Abrams Tanks, and more. It’s common for us to manufacture a custom spring assembly for our clients’ proprietary devices, but we also have a selection of stock springs that can be useful at the prototype / developmental stages of a project.
A few of the types of springs that we manufacture at John Evans’ Sons include constant force springs, spiral torsion springs, and power springs. If you’d like to learn more about any of these products and which is best for your application, please reach out to our engineering team.
Constant force springs are frequently used for applications that require counterbalancing, including windows. In fact, window balance springs are one of our most successful products.
In addition, the springs we manufacture are often designed for medical devices and aerospace applications. Their smooth range and steady motion control enhance instrument articulation.
High Torque with Little Rotation: Spiral Torsion Springs
Spiral torsion springs are another popular product we manufacture at John Evans’ Sons. These springs are ideal for applications that require high torque and less than 360 degrees of rotation. (270 degrees maximum is preferred).
Spiral torsion springs are commonly used in applications that require a “return to center” function, like a medical instrument joystick. They’re also ideal for electric motors and automotive applications. If your application requires this “return to center” function, developing a custom spiral torsion spring may be the best solution.
Torque with Significant Rotation: Power Springs
Power springs (also referred to as clock springs) are appropriately named due to their rotational energy that takes the form of torque. The torque increases as the spring is wound tighter. They are wound around an arbor or shaft and are retained in a housing.
Their large rotation capabilities make them an ideal spring for a number of automotive applications or medical devices. Power springs are also frequently used for counterbalance mechanisms in industrial sectors.
Custom vs. Stock Springs: Which are Best for You?
As you begin to develop a concept regarding what type of spring(s) you’ll need for your device or application, you’ll want to begin to weigh the benefits of custom versus stock springs. A quality contract manufacturer should be able to offer both options, but they should also be able to tell you which is best for your application. John Evans’ Sons has custom and stock springs available for the products mentioned above.
A custom spring or assembly may be better when you require exact dimensions for your design. A stock spring will likely be an approximate fit.
On the other hand, a stock spring could be ideal if you need a quick turnaround. This type of spring can lower costs if you don’t require customization.
However, both types of springs are cost-effective, as long as you’re choosing the one that best fits your device. In some instances, custom springs are actually the more cost-effective option because you’re getting exactly what you need the first time.
Many companies select John Evans’ Sons for our custom design capabilities, which include our fully staffed and equipped, in-house tool-making department. Other companies choose us for the convenience of our stock spring selection.
Buyers and engineers who are familiar with the RFQ process prioritize cost and lead time when selecting a components manufacturer for their medical device project. While these are important considerations, there are other capabilities you should look for in a manufacturer. These considerations can have a direct effect on project cost and timeline.
All industries require safety and quality control, but these are especially paramount in medical device manufacturing. Medical ISO certification is a rigorous process that mandates ongoing quality improvements. An ISO 13485 certification demonstrates a manufacturer’s commitment to maintaining standards for finished medical devices and critical components within medical devices. This certification accounts for regulatory requirements and changes specific to medical device manufacturing.
Ideally, your manufacturing partner should have an ISO certification(s), specifically the ISO 13485 certification. John Evans’ Sons is proud to be ISO 13485 certified.
Custom Manufacturing
Due to the precision and innovation required for medical devices, you’ll likely need a unique, complex assembly rather than one single spring product. It’s beneficial to partner with a spring manufacturer who can develop a custom spring assembly for you.
Some organizations may only be able to provide stock springs, in which case, you’ll be outsourcing multiple products from multiple manufacturers. You’ll also likely run into the potential of dimensional and production difficulties that come from sourcing components from various manufacturers.
A manufacturer such as John Evans’ Sons can most often handle the entire assembly from start to finish within one facility. This will reduce your overall device project cost and maintain quality control.
Design engineering department
The need for a custom spring assembly often arises during the design and engineering phase. If your manufacturer has a design engineering team in-house, it’s much easier to account for design changes.
Our design engineers and manufacturers work closely together to minimize prototype revisions. The engineers discuss design requirements, counterbalancing challenges, and other considerations with our medical device clients. They’re also aware of how design changes could can affect manufacturing costs. This means no surprises when those important design changes need to be made.
In-house tooling facilities
John Evans’ Sons has an in-house tool and die department, which means we can make products for custom assemblies quickly. We’re able to design and build tools to manufacture components often required for custom spring assemblies.
Additionally, in-house tooling makes it easier to make design adjustments, which is common in medical device manufacturing. Because we don’t have to outsource tooling, this can help to reduce project time and cost, while improving quality control.
There are many factors to consider when selecting a spring manufacturer for your medical device. Cost and lead time, while important, aren’t the only things you should think about. Look for capabilities like tooling, custom assembly manufacturing, and design engineering. Don’t underestimate certifications either. A certified spring manufacturer also demonstrates their commitment to quality medical manufacturing standards. Seek a manufacturer that can demonstrate their knowledge and expertise.
Make John Evans’ Sons your spring manufacturing partner. Our Engineering and Sales teams are here to help. Contact our experts to learn more about our manufacturing capabilities in the medical device sector.
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If you’re ready to take the next step, John Evans’ Sons can help, with expert advice on your spiral torsion spring applications. Request a quote today, or contact us to learn more about our full range of in-house capabilities.
