Product Specification

Custom Double Torsion Spring | High-Fatigue Automotive Springs

Product Description

Custom Double Torsion Springs are precision-engineered mechanical springs designed to store and release rotational energy while providing consistent torque and long-lasting performance under repeated stress cycles. Manufactured from premium-grade spring steel, stainless steel, music wire, or customized alloy materials, these springs are widely used in automotive systems, industrial equipment, electrical devices, and precision machinery.

Unlike single torsion springs, double torsion springs feature two coiled sections connected by a center leg, enabling balanced torque distribution and enhanced load-bearing capability. This design significantly improves stability, durability, and fatigue resistance, making them ideal for high-cycle applications requiring reliable rotational force and extended service life.

Our high-fatigue automotive torsion springs are produced using advanced CNC spring forming technology and strict quality control procedures to ensure dimensional accuracy, consistent torque values, and excellent mechanical performance. We support custom designs based on customer drawings, samples, or technical requirements, including wire diameter, coil diameter, leg configuration, torque force, material selection, and surface finishing.

These custom double torsion springs are commonly used in automotive seats, door lock systems, hinges, brake assemblies, interior components, electronic devices, agricultural machinery, and industrial hardware applications where high durability and precision performance are essential.

Features

• High fatigue resistance for long service life
• Precision torque control and stable rotational force
• Double-coil structure for balanced load distribution
• Excellent elasticity and deformation recovery
• Customizable dimensions, torque, and leg configurations
• Corrosion-resistant surface treatments available
• Suitable for high-temperature and heavy-duty applications
• Manufactured with CNC precision spring forming equipment
• Consistent quality with strict inspection standards
• OEM and ODM customization supported

Technical Parameters

Applications

Custom double torsion springs are widely used across multiple industries that require reliable rotational force, long fatigue life, and compact mechanical performance.

Automotive Industry

These springs are extensively applied in automotive components such as:

• Car door lock systems
• Seat adjustment mechanisms
• Brake systems
• Sun visors
• Fuel caps
• Hinges and latches
• Interior control components

Their high fatigue resistance ensures stable performance even under continuous vibration and repeated operation in demanding automotive environments.

Industrial Machinery

Double torsion springs are used in industrial equipment for:

• Mechanical linkages
• Control systems
• Automation equipment
• Agricultural machinery
• Heavy-duty industrial hinges

They help improve operational efficiency by providing controlled rotational movement and reliable restoring force.

Electronics and Electrical Devices

Suitable for:

• Switch assemblies
• Battery compartments
• Electrical connectors
• Consumer electronics
• Smart devices

The compact design allows integration into limited spaces while maintaining precise mechanical functionality.

Household Appliances

Frequently used in:

• Washing machines
• Microwaves
• Refrigerators
• Small kitchen appliances
• Smart home devices

These springs provide stable opening, closing, and positioning functions for various moving components.

Customization

We provide fully customized double torsion spring manufacturing services according to your application requirements.

Customizable Options

• Wire diameter
• Coil diameter
• Number of coils
• Leg length and angle
• Torque value
• Rotation direction
• Material selection
• Surface treatment
• Heat treatment
• Packaging method

Design Support

Our engineering team can assist with:

• Spring structure optimization
• Torque calculation
• Material recommendation
• Prototype development
• Sample production
• Mass production solutions

Customers can provide:

• Technical drawings
• CAD files
• Samples
• Performance requirements

OEM and ODM projects are welcomed.

Support and Services

We provide comprehensive technical and manufacturing support throughout the entire project lifecycle.

Our Services Include

• Professional engineering consultation
• Custom spring design assistance
• Rapid prototype manufacturing
• Small batch and mass production
• Strict quality inspection
• Material certification support
• Surface treatment solutions
• Stable global supply capability
• Fast response technical support

Quality Control

Each batch undergoes rigorous inspection including:

• Dimensional inspection
• Torque testing
• Fatigue life testing
• Surface quality inspection
• Material verification

We are committed to delivering stable quality and reliable performance for industrial and automotive applications.

Packing and Shipping

Packing

• PE bags and export cartons
• Customized labeling available
• Anti-rust protection packaging
• Tray and blister packaging optional
• Safe packaging for international transportation

Shipping Methods

• Express delivery (DHL, FedEx, UPS, TNT)
• Air freight
• Sea freight
• Railway transportation

Lead Time

• Sample Production: 5–10 working days
• Mass Production: 15–30 working days depending on order quantity

FAQ

1. Can you manufacture springs according to drawings or samples?

Yes. We support full OEM and ODM manufacturing based on customer drawings, samples, or technical specifications.

2. What materials are available for double torsion springs?

Common materials include stainless steel, music wire, carbon steel, alloy steel, and customized spring materials.

3. What industries use double torsion springs?

These springs are widely used in automotive, electronics, industrial machinery, household appliances, and hardware industries.

4. Can you provide surface treatment services?

Yes. We offer zinc plating, nickel plating, powder coating, black oxide, electrophoresis, and other customized surface treatments.

5. Do you provide sample production before mass orders?

Yes. Prototype and sample production services are available for testing and approval before bulk manufacturing.

6. How do you ensure product quality?

We perform strict quality inspections including dimensional testing, torque testing, fatigue testing, and material verification.

7. What information is needed for customization?

Please provide drawings, wire diameter, material requirements, torque specifications, dimensions, application details, or samples whenever possible.

8. Can you support international shipping?

Yes. We provide worldwide shipping solutions by express, air, sea, and railway transportation.