Your Suitable Tension Spring Supplier in China - Tuohai
Tuohai is a professional coil spring manufacturer in China, the tension spring is one of our main products. We possess exceptional manufacturing and design capabilities, with our manufacturing personnel and technical engineers proficient in both cold coiling and hot coiling processes. Whether it’s high tension springs, large coil springs, or other types of tension springs, we can manufacture them for you.
About Tension Spring
Tension springs, also known as extension springs, are a type of coil spring composed of multiple tightly connected coils with hooks or looped ends for attachment to other components. During the manufacturing process, the wire is bent backward and wound, giving the tension spring an initial tension. When stretched, it provides resistance.
Tension spring applications span various industries, including mechanical and manufacturing, electronic components, sports equipment, and medical devices, to name a few. Their simplicity, efficiency, and cost-effectiveness make tension springs a crucial component in many aspects of modern life.
Tension Springs By Material
Following are some of the most commonly used materials for tension springs. However, Tuohai also offers customized services for tension spring materials.
Additionally, tension springs made from different materials can be finished with various surface treatments.
This type of spring possesses excellent corrosion resistance, available in materials such as SS17-7, SS302, SS304, and SS316. These materials allow for their use in various harsh environments.
This type of tension spring is made from low-carbon or medium-carbon steel, coated with a layer of zinc to enhance its corrosion resistance. It has good toughness and is used for low-load applications.
Made from high-carbon steel wire, this spring boasts high tensile strength and fatigue resistance. It is a high-performance tension spring used in applications that require small sizes yet high loads.
This type of tension spring is widely used in medium to low-load applications. It is made from low-carbon steel, resulting in a spring with higher strength and hardness, and at a lower cost.
This type of tension spring is made from high-carbon steel that has been oil quenched and tempered, offering higher elasticity and toughness. Additionally, it possesses superior high-temperature resistance.
This is a high-performance tension spring, enhanced with chromium and silicon in its material composition to improve strength and fatigue resistance. It is suitable for high-load or high-temperature applications.
The Beryllium Copper Tension Spring combines the high electrical conductivity of copper with the strength and hardness of steel, making it suitable for applications that require both high strength and excellent electrical conductivity.
The Phosphor Bronze Tension Spring has good corrosion resistance and moderate mechanical properties, along with excellent electrical conductivity. It is a type of tension spring with a well-balanced set of characteristics.
Tension Spring By End Types
The common end types of tension springs are hooks or looped structures, and their shapes can be customized. These structures may be positioned on the side of the spring, or, before forming a hook or loop, the wire transitions towards the center from the last coil, making the plane of these structures align with the central axis of the spring. Additionally, the angle between this plane and the central axis can be adjusted according to your requirements.
If you need a specific end configuration, please contact us for a quote now.
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The wire at the end of the tension spring forms a hook positioned along the central axis, providing a more stable connection when attached.
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Tension Spring with Center LoopsThe wire at the end of the tension spring forms a closed loop positioned along the central axis, ensuring a more stable connection when attached.
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Tension Spring with Draw BarsThis type of tension spring is composed of a compression spring and two special rods, designed to limit its maximum extension length for safer use.
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Tension Spring with Extended Machine HooksThis type of tension spring features an elongated hook at the end, a design that enables the spring to connect to points that are further apart.
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Tension Spring with Expanded HooksThe hook at the end of the spring is widened and enlarged, making it more convenient and faster to connect, facilitating easier installation and removal.
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Tension Spring with Standard Machine HooksThis is the most common end type for tension springs, featuring a simple hook structure suitable for various standard applications.
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Tension Spring with Rectangular EndsThe hook at the end of the tension spring is rectangular, a design commonly used at flatter connection points to avoid concentrated stress.
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Tension Spring with Reduced End and Swivel HookThe diameter of the tension spring end gradually decreases and a rotatable hook, which can reduce bending and wear when the spring is under load.
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Tension Spring with V-HooksThe hook at the end of the spring is V-shaped, it is more stable when loading, suitable for applications requiring stability during use.
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Costomized End TypesThe shape of the hook at the end of the tension spring can be customized, such as teardrop-shaped ends or threaded inserts.
Product Feature Box
Advanced Production Equipment
Tuohai has continuously pursued research and improvement in the production technology of tension springs. We have achieved automation in our production lines, employing the most advanced production equipment and processes to ensure the quality of our tension springs and meet customers’ requirements in terms of performance, size and other aspects.
Comprehensive Customization Service
Tuohai is not only adept at manufacturing various types of compression springs but can also design according to your requirements, propose effective solutions, and assist in developing the compression spring most suitable for your application.
Our technical team and engineers possess extensive professional knowledge and can help you improve existing designs, processes, and precision-machine various types of wire according to your requirements, such as tolerances, shapes, performance specifications, etc.
Secondary Processing Services
Tuohai can also provide you with a variety of secondary processing services, including grinding, welding, heat setting, adding components, and assembly of tension springs, to meet the comprehensive needs of different customers and products. This simplifies the procurement process for customers and enhances efficiency.
Rigorous Testing
All tension springs from Tuohai undergo strict testing to ensure they meet the highest standards of performance, sizes, and others.
Tests include profile projection, tensile testing, compression testing, fatigue resistance testing, hardness testing, optical measurement, salt spray testing, and more. Various test reports can be provided upon customer request.
Why Choose Tuohai Tension Spring
Tuohai has over 20 sets of various wire-forming machines, along with several grinders, straighteners, and various testing equipment. We also possess experienced manufacturing personnel and technical engineers familiar with both cold rolling and hot rolling processes, capable of customizing springs of various shapes, materials, and sizes for you.
Our products have passed various international certifications, including ISO, TUV, CE, IAFT, ROHS, etc., and are exported to more than 20 countries worldwide, with over 70 million pieces of various springs sold, receiving a lot of positive feedback from customers.
Our professional team can provide you with 7*24 service. Any of your questions will be responded to within 1 hour, and we will also contact you on the same day during holidays and festivals, solving all your problems.
We have established cooperative relationships with several excellent logistics companies, enabling us to offer you high-quality logistics services. Whether you choose sea freight, air freight, or options like rail, container trucking, and express delivery, we can propose the best solutions for you, ensuring that products are delivered to your hands quickly and safely.
Surface Treatment Options of Tension Spring in Tuohai
By forming a metal protective film on the surface of the spring through electrolysis, it can improve corrosion resistance, wear resistance, etc. Common electroplating materials include zinc, nickel, chromium, etc.
Spray one or more layers of protective material on the surface of the spring, it can enhance corrosion resistance, wear resistance, and aesthetics. Common coating materials include powder coatings, plastics, or rubber.
Forming a phosphate protective film on the surface of the spring can enhance the corrosion resistance of the spring, reduce wear during use, and also serve as a base layer for other surface treatment methods, improving their adhesion.
Passivation is commonly used for stainless steel tension springs, forming a dense oxide protective layer on their surface, which can further enhance the corrosion resistance of stainless steel springs.
Shot peening involves the high-speed projection of steel shots, iron sand, and other abrasives impacting the surface of the spring, increasing the surface hardness of the spring, enhancing fatigue resistance, and extending its service life.
Related Product
The delivery time for standard orders is generally 30 to 35 days.
Custom orders require negotiation based on the specifics of the product.
Samples will be dispatched within 2 days after confirmation.
If customized samples are needed, it will take about 7 days.
We can produce extension springs of various standard sizes.
Wire diameters ranging from 0.008 inches to 0.750 inches
Spring lengths from 1/2 inch up to 50 feet.
Additionally, we can also customize non-standard size extension springs according to your dimensions.
We can manufacture any extension spring you desire based on your drawings or samples. Our professional technical team can ensure 100% satisfaction with your requirements.
You can make payments via T/T (Telegraphic Transfer), Letter of Credit, Western Union, or PayPal.
Trade terms include FOB (Free On Board), CIF (Cost, Insurance, and Freight), EXW (Ex Works), DDU (Delivered Duty Unpaid), and DDP (Delivered Duty Paid) among others.
Yes, you can customize samples.
Customizing samples may require adjustments or the remaking of molds, therefore, there will be some charges for customized samples. These charges will be fully refunded once the order is confirmed.
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