Precision compression, extension and torsion springs for industrial applications.
SPRINGS
Torsion Springs Manufacturer for Industrial & Agricultural Applications
Custom torsion springs designed for consistent torque performance, precise leg geometry and long service life.
At Super Springs, we work with engineers and procurement teams who need reliable rotational force in their assemblies — from small single torsion springs for consumer products to heavy-duty double torsion springs for agricultural cultivators.
We manufacture single and double torsion springs tailored to your exact torque, leg length, leg angle and wire diameter requirements
What Are Torsion Springs
Torsion springs are helical springs that store energy when twisted or rotated. Unlike compression and extension springs which work along a linear axis, torsion springs exert a rotational force — they resist angular deflection and return to their original position when the load is released.
They have two legs extending from the coil body. When one or both legs are deflected, the spring stores energy and exerts torque in the opposite direction. The coils wind tighter as the spring deflects.
Key Torsion Spring Design Parameters
A well-designed extension spring depends on multiple factors. We work closely with your design inputs to ensure performance is predictable and repeatable.
Key extension spring design parameters include:
• Wire diameter (d)
• Outer diameter of coil body (OD)
• Number of active coils (N)
• Leg length 1 (L1) — first leg extending from the coil
• Leg length 2 (L2) — second leg extending from the coil
• Leg angle — the angle between L1 and L2 in the unloaded state
• Direction of wind — left-hand or right-hand helix
• Torque at a specified angular deflection
• Angular spring rate (N·mm per degree)
Please read our article about Specifying a custom Spring - 8 parameters you must get right. If you are working on calculations, you can also use our Spring Rate Calculator to estimate performance during the design stage.
Single vs Double Torsion Springs
Single torsion springs
A single torsion spring has one coil body with two legs — one at each end. It is the most common torsion spring configuration. Used in automotive hinges, furniture recliners, door closers, safety mechanisms, clip mechanisms and a wide range of consumer and industrial applications.
Double torsion springs
A double torsion spring has two coil bodies wound in opposite directions and connected at the centre. This provides a higher torque output and symmetrical loading compared to a single torsion spring of the same wire diameter.
Double torsion springs are the standard configuration for agricultural cultivator tines, harrow teeth and heavy mechanical assemblies that require balanced force from both sides.
When specifying a double torsion spring, additionally provide: the width between the two coil bodies, and confirm the direction of wind for each coil (typically one left-hand and one right-hand).
Materials Used
Material selection determines the spring's strength, fatigue life and suitability for the operating environment.
We manufacture torsion springs in:
• Spring Steel SM/DM (medium carbon) — general purpose indoor industrial applications
• Spring Steel SH/DH (high carbon) — high load, agricultural equipment, outdoor and high cycle applications
• Stainless Steel SS304 — corrosion resistant, suitable for outdoor, food contact and humid environments
• Stainless Steel SS316 — for aggressive corrosive environments
• Music Wire (EN 10270-1) — high strength for precision and instrument applications
• Oil Tempered Wire (EN 10270-2) — for dynamic and heavy-duty applications
For agricultural double torsion springs, SH/DH spring steel is the standard grade — it provides the tensile strength and fatigue resistance required for field conditions. For outdoor installations without protective coating, SS304 is recommended.
Manufacturing Capabilities
We focus on manufacturing consistency — especially important for OEM supply.
Our capabilities include:
• Wire diameters from 0.3 mm to 6 mm
• Single and double torsion spring configurations
• Left-hand and right-hand wind directions
• Custom leg lengths L1 and L2 to drawing
• Custom leg angles from 0° to 360°
• Precision-controlled CNC coiling and forming machines
• Tight dimensional tolerances on leg angles and coil diameter
• In-house torque testing for precision manufacturing
• Heat treatment for strength and dimensional stability
• Surface finishing — zinc white plating, zinc black, powder coating, passivation
• Low MOQ for prototypes and new product development
• High-volume production for ongoing OEM supply
Whether you need prototypes or ongoing production, the goal remains the same — reliable output, batch after batch.
Wire Grades and Customisation — Manufactured in India
Our torsion springs are manufactured at our factory in Gurgaon, India in spring steel grades SM/DM and SH/DH, along with SS304 stainless steel for corrosive or outdoor applications.
To order a custom torsion spring, provide: wire diameter (d), outer diameter (OD), number of coils (N), leg length L1 and L2, leg angle, direction of wind and torque at a specified angular deflection — or simply send a drawing or sample.
For double torsion springs, also provide the width between the two coil bodies. We supply automotive, agricultural, industrial machinery, furniture and consumer product sectors. 40+ years of manufacturing. ISO 9001:2015 certified. Exporting to 14 countries
Applications
Torsion springs are used across a wide range of industries where controlled rotation or angular return is required:
• Agricultural equipment — cultivator tines, harrow teeth, seeder mechanisms (double torsion)
• Automotive — door hinges, boot lids, glove box mechanisms, seat recliners
• Furniture — recliner chairs, folding mechanisms, lid hinges
• Safety and protective gear — helmet locking mechanisms, visor return springs
• Industrial machinery — door closers, access panel return mechanisms
• Consumer products — clothespeg-type clamps, tool clips, stationery mechanisms
• Electrical and electronic assemblies — switch return mechanisms, instrument springs
Each application has its own torque, leg geometry and cycle life requirements — and the design must reflect that.
Surface Treatments
Surface treatment provides corrosion protection and in some applications improves fatigue life.
• Zinc white plating — standard finish for indoor and mild outdoor applications
• Zinc black — same protection with a black appearance
• Powder coating — for colour matching and enhanced outdoor protection
• Passivation — for stainless steel springs, enhances corrosion resistance
• Shot peening — improves fatigue life for high-cycle applications
• No coating — for lubricated or internally protected assemblies
For agricultural applications exposed to soil, moisture and fertilisers, zinc white plating is the standard recommendation for spring steel grades.
Custom Torsion Springs
Most torsion spring applications require customisation — and that is where we focus.
We support:
• Manufacturing to drawing — any format including PDF, DXF, STEP or hand sketch
• Design-based requirements — provide torque, angular deflection and space constraints
• Sample replication — send a physical sample and we measure and replicate it
• Prototyping and development — low MOQ for new product development
• OEM supply — consistent bulk production for ongoing programmes
• Double torsion springs for agricultural OEM customers — a speciality product at Super Springs
The goal is not just to make springs, but to ensure they perform reliably in your application.
The angular spring rate (kt) of a torsion spring is calculated using:
kt = Ed⁴ / 10.8DN
Where:
• E = Young's modulus of the wire material (206,000 MPa for spring steel, 193,000 MPa for SS304)
• d = wire diameter
• D = mean coil diameter (OD minus wire diameter)
• N = number of active coils
The result is the angular spring rate in N·mm per degree. Multiply by the angular deflection in degrees to get the torque at that angle.
You can use our Spring Rate Calculator — Torsion tab for quick estimation during the design stage.
Over time, we’ve realised that most customers are not looking for a “vendor” — they’re looking for a dependable manufacturing partner.
What matters to them:
-
Consistency across batches
-
Predictable performance
-
Clear communication
-
Long-term reliability
That’s exactly what we focus on.
Frequently asked Questions
What is the difference between a single and double torsion spring?
A single torsion spring has one coil body. A double torsion spring has two coil bodies wound in opposite directions connected at the centre — providing higher torque and symmetrical loading. Double torsion springs are standard for agricultural cultivator tines and heavy mechanical assemblies.
What materials are used for torsion springs?
We manufacture in spring steel SM/DM and SH/DH, stainless steel SS304 and SS316, music wire and oil tempered wire. For agricultural and outdoor applications, SH/DH spring steel is standard. For corrosive environments, SS304 is recommended.
What wire diameter range do you manufacture in?
We manufacture torsion springs from 0.3 mm to 6 mm wire diameter. For heavier agricultural applications requiring larger wire diameters, contact us with your specification.
How do I specify a torsion spring?
Provide: wire diameter, outer diameter, number of coils, leg length L1 and L2, leg angle, direction of wind and torque requirement. For double torsion springs, also provide the width between coil bodies. Alternatively, send a drawing or physical sample.
Can you manufacture agricultural double torsion springs?
Yes. Double torsion springs for cultivators, harrows and agricultural implements are one of our speciality products. We manufacture in SH/DH spring steel and SS304 to customer drawings or samples. Low MOQ available for new product development.
What tolerances can be achieved?
Tolerances on leg angle, leg length and coil diameter depend on the wire size and spring design. We maintain tight control using CNC forming machines and in-house torque testing to ensure consistent performance in production.
How is torsion spring rate calculated?
Angular spring rate depends on material, wire diameter, coil diameter and number of active coils. Use our Spring Rate Calculator — Torsion tab for quick estimation, or contact us with your load and deflection requirements.
