Defense Spring Manufacturing
The defense industry demands components that can endure extreme conditions, heavy loads, and high-impact environments. From advanced aerospace systems to military ground transport, every part must meet strict industry standards and be built with precision for long-term durability.
Springs and mechanical assemblies are critical to ensuring the functionality and efficiency of various defense applications, including aerospace, naval systems, and unmanned vehicles.
John Evans’ Sons manufactures custom and standard springs for defense contractors, OEMs, and government agencies. Through expertise and innovation in precision engineering and manufacturing we continue to meet the standards and demands of defense applications.
How John Evans’ Sons Serves the Defense Industry
With roots dating back to World War I, John Evans’ Sons has been a trusted supplier of custom springs for the defense industry. Our springs support:
- Military Ground Transport
- Aircraft Systems
- Defense Infrastructure
- Aerospace Applications
Whether deployed in deep-sea naval vessels or high-altitude aerospace systems, our components are engineered to withstand extreme pressures, temperatures, and vibrations. At John Evans’ Sons, we provide the mechanical reliability required for tactical success, ensuring that every spring and assembly delivers failure-free functionality when it matters most.
Applications
Springs ensure performance, safety, and efficiency in demanding defense environments.
Types of Springs
John Evans’ Sons manufactures a comprehensive range of springs and components for defense applications:
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Constant Force Springs
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Spiral Torsion Springs
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Power Springs
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Wire Forms
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Stampings & Flat Springs
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Helical Springs
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Spring Reels
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Shock & Vibration Isolators
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Torsion Leaf Springs
Constant Force Springs
- Used in applications requiring consistent force over a long deflection range
- UAV launch and recovery systems
- Retractable mechanisms
- Counterbalances in aerospace equipment
Spiral Torsion Springs
- Provide rotational energy for precise motion control
- Heavy-duty counterbalancing
- Aircraft landing gear systems
- Aerospace deployment mechanisms
Power Springs
- Store and release energy in controlled movements
- Retraction mechanisms
- Automated deployment systems
Wire Forms
- Securing and guiding cables
- Structural reinforcements
- Specialized fastening solutions
Stampings & Flat Springs
- Precision-engineered components for electronics and structural support
- Electrical contacts, clips, and brackets
Helical Springs
- Compression, extension, and torsion springs are designed to apply forces, absorb shock and support loads
- Used in aircraft assemblies and ground transport
Spring Reels
Provide controlled cable management for:
- Communication devices
- Retractable tethering systems
- Aerospace-grade hose reels
Shock & Vibration Isolators
- Protect sensitive equipment from impact and environmental stress
- Used in avionics, radar systems, and vehicle-mounted electronics
Torsion Leaf Springs
- Load-bearing and suspension applications
- Heavy-duty machinery and aerospace transport
These are used to counter-balance heavy armored hatch covers on military equipment, including:
- Bradley Fighting Vehicle
- M1A1 Abrams tank
- Various other armored vehicles.
These springs, generally stacked together in packs of 8–12 pieces, develop large amounts of torque in a very short deflection. We work with a variety of spare parts contractors including OEM and Defense.
Micro Springs
Compact components that perform reliably under extreme conditions. At John Evans’ Sons, we can produce micro springs as thin as 0.002” with tight tolerances.
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Benefits of Springs for Defense
Springs play a critical role in defense systems, enhancing equipment reliability, longevity, and operational efficiency in extreme environments.
- Enhanced control over movement
- Tension and compression applications
- Precise force distribution
Springs support aerospace systems, targeting mechanisms, and other high-performance applications requiring exact force and motion control.
- Efficient energy storage and deployment
- Converts potential energy into kinetic energy
- Reliable force output in harsh conditions
- Optimized for space-constrained designs
- High force in minimal footprint
- Designed for longevity in extreme environments
- Resists fatigue, corrosion, and high stress
- Engineered for critical aerospace operations
- High-precision components for consistent functionality
Compression springs actuate safety mechanisms, while extension springs reinforce structural integrity in aerospace and ground transport applications.
- Precision motion control
- Vibration and shock absorption
- Counterbalancing for stability
Our custom-engineered springs are integral to a wide range of defense systems, including aircraft landing gear, UAV mechanisms, and naval defense applications.
- Meets stringent industry standards (MIL-SPEC)
- Designed for mission-critical performance
- Tested for reliability in demanding operational conditions
Performance Considerations
Selecting the right spring for each critical function ensures consistent and reliable performance in extreme environments. Defense springs must be engineered to withstand fatigue, high-impact forces, temperature fluctuations, corrosive conditions, and mechanical stress.
- Load & Force Requirements – Springs designed for precise force applications.
- Corrosion Resistance – High-performance materials for harsh environments.
- Longevity & Fatigue Resistance – Optimized for extended service life in mission-critical applications.
Materials
John Evans’ Sons utilizes premium materials for aerospace-grade reliability:
View Materials
Industry Experience & Certifications
In the Aerospace and Defense industry, there is no margin for error. Every component must be engineered to perform with absolute precision and reliability, often in extreme environments where failure is not an option.
From aircraft systems to mission-critical defense technologies, safety, traceability, and performance are paramount. That’s why stringent industry regulations govern not only finished assemblies, but every individual component that goes into them.
At John Evans’ Sons, we specialize in manufacturing precision spring and assembly solutions built to meet these rigorous demands. Our quality management systems are certified to ISO 9001 and AS9100 standards, ensuring strict process control, full material traceability, risk mitigation, and continuous improvement across every project.
By combining advanced engineering expertise with aerospace-grade manufacturing standards, we deliver high-performance components our customers can depend on—supporting critical applications where reliability, longevity, and uncompromising quality are essential.
Product Resources
Your Defense Spring Manufacturing Partner
John Evans’ Sons is committed to delivering precision-engineered springs and assemblies for aerospace and defense applications. Our in-house engineering, tooling, and manufacturing capabilities ensure high-quality, cost-effective solutions.
Need Assistance? Consult Our Technical Team
Our Technical Team offers a depth of expertise to assist you with all parts of the process. We are ready to answer your questions in a timely manner and will help you define what you need. We produce custom springs for all purposes, and we are here to work with you on any of your customization needs.
Request Your Custom Constant Force Spring Design
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