Product Specification

Custom Continuous Torsion Spring | Black E-Coated Fatigue Resistant

Product Description

The Custom Continuous Torsion Spring, also recognized in the industry as a U-Shaped Double Torsion Spring, is a high-performance mechanical component designed for heavy-duty applications requiring exceptional stability and synchronized reset force. Unlike standard springs that consist of separate units, this continuous coil design is manufactured from a single, uninterrupted piece of high-tensile wire. This unique "U-bridge" architecture ensures that the mechanical load is distributed evenly across the dual coils, eliminating the risk of unbalanced tension or component tilting.

At the METS Team factory, we specialize in the precision forming of these large-scale springs using advanced multi-axis CNC machinery. To ensure long-term durability in high-traffic environments, each spring is finished with a premium Black Electrophoresis (E-Coated) treatment. This coating provides 360-degree coverage, offering superior salt-spray resistance and a smooth, low-friction surface. Engineered for Fatigue Resistance, our continuous coil springs are the preferred choice for commercial-grade gym equipment and industrial safety mechanisms where failure is not an option.

Key Features

• Seamless One-Piece Construction: The continuous wire design eliminates welding points, significantly reducing stress concentration and increasing the spring's lifespan.

• Synchronized Dual-Coil Force: The integrated U-bridge ensures both coils act as a single unit, providing a perfectly balanced return torque for heavy levers.

• Premium Black E-Coated Finish: Provides high-grade corrosion protection and a professional aesthetic that resists chipping and scratching.

• High-Cycle Fatigue Life: Specifically tempered to withstand over 500,000 cycles of heavy-duty operation without permanent deformation (setting).

• Vibration Dampening: The dual-coil structure naturally absorbs mechanical vibrations, leading to quieter operation in fitness and industrial machinery.

Technical Parameters

Industrial Applications

Our continuous coil torsion springs are engineered for systems that demand high reliability and high torque:

• Commercial Fitness Equipment: The primary component for spin bike braking systems, stepper resistance levers, and rowing machine resets. It provides the heavy-duty "snap-back" feel required for professional gym gear.

• Industrial Safety Gates: Used in self-closing heavy-duty industrial gates and safety barriers where a consistent, balanced closing force is mandatory.

• Heavy-Duty Furniture: Integrated into reclining mechanisms for high-end theater seating and adjustable industrial workstations.

• Agricultural Machinery: Found in heavy-duty latching systems for tractors and harvesting equipment that endure high vibration and harsh conditions.

• Automotive Tailgate Assists: Provides the necessary counter-balance force for heavy trunk lids and cargo doors.

Customization Services

As a specialized B2B manufacturer, the METS Team offers full OEM/ODM support to match your specific mechanical requirements:

• Structural Customization: We can adjust the span of the U-bridge and the number of coils to match your mounting bracket dimensions.

• Torque Calibration: Our engineers calculate the precise wire gauge and coil density to achieve the exact resistance curve your product needs.

• Material Variations: Options include music wire for extreme fatigue life or stainless steel for maximum corrosion resistance in outdoor fitness parks.

• End Geometry: Hooks and loops can be custom-bent to various angles (90°, 180°, etc.) for seamless "drop-in" assembly.

Support and Services

• Engineering DFM Review: We analyze your design to ensure maximum performance and cost-efficiency during mass production.

• In-House Fatigue Testing: We provide cycle-test reports to verify that each custom design meets your durability standards.

• Salt Spray Validation: E-coated samples undergo rigorous salt spray testing to guarantee rust protection levels.

Packing and Shipping

• Protective Packaging: Due to their large size, springs are individually layered with protective dividers to prevent surface scratches and tangling.

• Global Export Logistics: Efficient shipping via Sea (FCL/LCL) or Air for large-scale B2B orders, complete with all necessary customs and material certifications.

FAQ

Q: Why use a continuous coil instead of two separate springs?

A: A continuous coil ensures that the tension is always perfectly synchronized. Using two separate springs can lead to uneven wear and mechanical tilting, whereas the U-bridge design keeps the mechanism stable and aligned.

Q: Is Black E-Coating better than Black Oxide for these springs?

A: Yes, for heavy-duty applications, E-coating is superior as it provides a thicker, more uniform protective layer that is much more resistant to rust and wear from friction.

Q: Can you produce this spring in larger dimensions, like 300mm or more?

A: Yes. Our multi-axis CNC machines are capable of forming large-gauge wire and long-span U-bridges. Please provide your technical drawing for a custom quote.

Q: What is the typical MOQ for these heavy-duty springs?

A: Our standard production MOQ is 500 units, but we can support smaller batches for initial prototype testing.