Double Torsion Springs

Xuanyu Springs provides professional custom solutions for double torsion springs . We use advanced precision CNC spring coiling equipment and high-quality materials, focusing on designing and manufacturing high-performance double torsion springs for applications requiring complex bidirectional motion and high torque output.

A double torsion spring consists of two coaxial or parallel wound elastic segments that store and release angular energy through torsional deformation. Its unique symmetrical structure provides more balanced torque output, higher operational stability, and greater total torque capacity in bidirectional rotation , making it an ideal core component for achieving precise bidirectional reset, reciprocating motion, or high torque output in a compact space.

Product Parameters

project	Core parameters
wire diameter range	0.5mm - 25.0mm , supporting a wider range of customization.
Material	High-grade materials: Suzuki 's SWOSC-V from Japan, SWP-B from South Korea , etc.
	Carbon steel: 70/72A/72B/82B/65MN, etc.
	Common alloy steels: 60Si2MnA/ 50CrVA/55CrSiA, etc.
	Oil-quenched and tempered steel wire: Static type FDC/FDSiMn/FDCrV/FDSiCr Medium fatigue resistance using TDSiMn/TDCrV/TDSiCr High fatigue VDC/VDCrV/VDSiCr/VDSiCrV
	Stainless steel materials: SUS302/SUS304/SUS316/SUS631 (17-7PH), etc.
	High-temperature alloy: 30W4Cr2VA / Inconle X-750 (GH4145) Inconle 718 (GH4149)/Nimonic90
	Copper alloys: beryllium bronze, phosphor bronze, etc.
Structural form	It features various structures such as parallel , coaxial , and nested configurations , and supports different combinations of left-hand and right-hand rotation to adapt to complex installation and stress requirements.
Manufacturing process	High-precision CNC winding : ensures consistent coil size and pitch, with minimal product variation within batches. Stress relief and heat treatment : Implemented as needed for the application to improve fatigue life and dimensional stability.
Fatigue life	≥500,000 cycles (standard test conditions). Longer lifespan designs are available to meet application requirements.
Surface treatment methods	Zinc plating, nickel plating, chrome plating, electrophoresis, powder coating, Teflon coating, blackening, Dacromet coating, etc., to meet the requirements of corrosion resistance, wear resistance, insulation or appearance.

 

We not only manufacture springs, but also provide highly reliable motion solutions based on engineering experience .

1. Expertise in the precision design and manufacturing of complex structures

We possess the technical expertise to design and reliably manufacture various parallel and coaxial double torsion springs. This ensures a high degree of coordination between the two torsion spring segments in terms of spatial and mechanical properties, achieving precise bidirectional symmetrical torque output and stable motion synchronization.

2. Optimized design for high load and long lifespan

The double torsion spring structure naturally helps to disperse stress and resist off-center loading. We further optimize its stress distribution through finite element analysis (FEA)-assisted design and precise heat treatment processes, significantly improving its fatigue resistance and service life under high-frequency, high-load reciprocating motion.

3. Deep capabilities in non-standard customization and system integration

Whether you require special helical configurations, specific mounting points, or need to integrate dual torsion springs into your drivetrain module, we provide full technical support from concept to finished product. We also support reverse engineering and matching design based on your system parameters.

4. Consistency and strength based on high-precision manufacturing

Automated CNC winding ensures that each spring strictly conforms to the design, achieving extremely low batch-to-batch variation and stable torque output. Combined with the selection of durable wire and appropriate heat treatment processes, our springs possess excellent fatigue resistance and maintain performance during long-term reciprocating motion.