Extension Springs for Energy Storage and Tension Control in Mechanical Systems

When designing systems that require tension control, elastic energy storage, or reliable force regulation, Extension Springs are often the ideal solution. These versatile components are essential in engines, automated systems, and consumer products where stretching and recoiling forces need to be carefully managed.

At Dongguan Sango Hardware Fasteners Co., Ltd., we specialize in the manufacturing of custom extension springs that provide the reliable tension control and energy storage needed for your mechanical systems.

1. What Is an Extension Spring?

An Extension Spring is a type of spring that is designed to absorb and store tensile energy. It works by resisting a stretching force and returning to its original length once the force is removed. These springs are designed to expand under a pulling force and contract when the force is released.

🔩 Key Benefits:

• Energy storage for controlled release
• Tension control for balance and stability
• Durable and reliable under tension
• Space-efficient and adaptable for a wide range of applications
• Available in custom lengths, diameters, and spring rates

2. Types of Extension Springs

🔹 Standard Extension Spring

• Regular cylindrical shape with loops at both ends
• Common in door mechanisms, sprinkler systems, and industrial applications

🔹 Tapered Extension Spring

• Tapered design to provide progressive tension
• Ideal for automotive suspension systems and high-load environments

🔹 Double-Torsion Extension Spring

• Combines torsion spring and extension spring features
• Used in latch mechanisms, grip systems, and mechanical timers

🔹 Heavy-Duty Extension Spring

• Designed for high tensile load and heavy-duty machinery
• Often used in agricultural machinery or industrial press systems

🔹 Miniature Extension Spring

• Compact size and lightweight design
• Used in medical devices, electronics, and precision instruments

3. Applications of Extension Springs

Extension springs are essential in systems requiring precise tension control and energy storage. Common applications include:

• 🚗 Automotive suspension systems
• 🛠 Power tools and hand tools
• 🧪 Medical devices and laboratory equipment
• 📦 Packaging machines, conveyor systems
• 🔒 Locking mechanisms and safety devices
• 🎮 Toys, fitness equipment, and exercise machines

These springs are integral to load balancing, positioning control, and system safety across multiple industries.

4. Material and Finish Options