Torsion springs are essential components across a wide range of industrial equipment, from agricultural machinery and automotive systems to mining equipment and manufacturing tools. Designed to store and release rotational energy, these springs must be manufactured with precision to ensure reliable performance under repeated stress and demanding operating conditions.
So, how are torsion springs made? The answer involves a detailed spring manufacturing process that combines material selection, precision coiling, heat treatment, quality testing, and strict adherence to customer specifications.
In this article, we take a closer look at how industrial torsion springs are manufactured and why working with experienced torsion spring manufacturers is critical for quality and long-term performance.
What Is a Torsion Spring?
A torsion spring is a spring that works by twisting rather than compressing or extending. When force is applied to the ends of the spring, torque is generated, allowing the spring to store mechanical energy and return to its original position once the force is removed.
Industrial torsion springs are commonly used in:
- Hinges and latches
- Agricultural machinery
- Garage doors
- Automotive assemblies
- Mining and industrial equipment
- Heavy-duty mechanical systems
Because these springs often operate in high-load or repetitive-motion environments, precision manufacturing is essential.
Step 1: Reviewing the Spring Design and Specifications
The first stage in the spring manufacturing process begins with the customer’s design.
Key specifications typically include:
- Wire size and material type
- Coil diameter
- Number of coils
- Direction of wind
- Leg length and angle
- Load requirements
- Operating environment
At Boynes Springs, we make sure to follow the customer-provided detailed drawings, samples, and specifications that outline exactly how the spring should be manufactured. This collaborative approach ensures the finished spring matches the intended application and performance requirements.
Step 2: Selecting the Right Material
Material selection plays a major role in determining the durability and performance of a torsion spring. Different industries require different material properties depending on environmental exposure, operating temperatures, and load demands.
Common materials used by industrial torsion spring suppliers include:
- Stainless Steel – Stainless steel offers strong corrosion resistance and is commonly used in marine, medical, and food-grade applications.
- High-Carbon Steel – High-carbon spring steel provides excellent strength and elasticity for general industrial applications.
- Specialty Alloys – For extreme operating environments, exotic alloys may be used to handle high temperatures, corrosive conditions, or heavy mechanical stress.
At Boynes Springs, we use high-grade Korean and European steel to ensure consistency, reliability, and long-term spring performance.
Step 3: Coiling the Torsion Spring
Once the material is selected, the wire is fed into specialised coiling machinery that forms the spring according to the required dimensions and winding direction.
This stage requires exceptional accuracy because even small variations in coil diameter or pitch can affect spring performance.
Modern torsion spring manufacturers use advanced CNC coiling machines capable of producing springs with highly precise tolerances. Depending on the application, springs may be manufactured as:
- Single torsion springs
- Double torsion springs
- Custom wire forms with integrated spring features
The coiling process is carefully monitored to ensure the spring geometry aligns with the supplied engineering drawings.
Step 4: Heat Treatment and Stress Relief
After coiling, torsion springs undergo heat treatment to improve their mechanical properties and relieve internal stresses created during manufacturing.
Heat treatment helps to:
- Increase durability
- Improve fatigue resistance
- Stabilise the spring shape
- Enhance load consistency
The exact temperature and treatment duration depend on the spring material and intended application.
Heat treatment helps improve the durability, elasticity, and fatigue resistance of industrial torsion springs after coiling. Industry resources from the Australian Steel Institute outline the importance of heat treatment and stress relief processes in steel fabrication and performance.
For high-performance industrial springs, this stage is essential to ensuring reliable long-term operation.
Step 5: Finishing and Surface Protection
Industrial torsion springs may also undergo additional finishing processes depending on the operating environment.
Common finishing treatments include:
- Shot peening to improve fatigue life
- Zinc plating for corrosion resistance
- Powder coating or specialised protective coatings
- Passivation for stainless steel springs
These treatments help protect springs from wear, moisture, chemicals, and environmental exposure, particularly in harsh Australian operating conditions.
Step 6: Testing and Quality Control
Before dispatch, springs are tested to ensure they meet the required specifications and quality standards.
Testing may include:
- Torque and load testing
- Dimensional inspections
- Fatigue testing
- Visual inspections for defects
- Performance verification under working loads
At Boynes Springs, production and testing are completed in our Osborne Park facility using ISO-standard quality processes. This helps ensure consistency across both prototype and large-scale production runs.
Reliable testing is especially important for industries where spring failure could lead to equipment downtime, safety risks, or costly production interruptions.
Fast Turnaround for Custom Industrial Springs
Lead times are a major consideration for manufacturers and maintenance teams. Delays in spring supply can impact production schedules and equipment availability.
Boynes Springs offers industry-leading turnaround times of approximately one to two weeks for many standard production runs, depending on project complexity and order size.
As experienced industrial torsion spring suppliers, we also provide Australia-wide delivery from our Perth manufacturing facility through established freight partnerships.
This combination of local manufacturing capability and responsive service helps minimise downtime for industrial clients across Australia.
Why Precision Matters in Torsion Spring Manufacturing
Torsion springs may appear simple, but their performance depends heavily on manufacturing precision. Incorrect material selection, inconsistent coiling, or inadequate heat treatment can lead to premature fatigue, deformation, or failure.
Experienced torsion spring manufacturers understand the importance of:
- Tight manufacturing tolerances
- Material traceability
- Consistent production quality
- Reliable testing procedures
- Fast and accurate production turnaround
For industrial applications, these factors directly impact equipment reliability, operational safety, and long-term maintenance costs.
Trusted Australian Torsion Spring Manufacturers
Understanding how torsion springs are made highlights the level of precision and expertise required throughout the manufacturing process. From customer-supplied specifications and material selection to coiling, heat treatment, and testing, every stage contributes to the final spring’s performance and reliability.
At Boynes Springs, we combine more than 60 years of Australian manufacturing experience with advanced production technology to deliver high-quality custom industrial springs for a wide range of industries. Whether you require prototypes, replacement components, or large production runs, our team can manufacture springs to your exact specifications with fast turnaround times and consistent quality. Contact our team today to bring your project to life.