Basic Info.
Model NO.
EXTENSION SPRING
Usage
Industrial, Auto, Furniture, Motorcycle, Home Appliance
Production Process
Cold Roll
Surface Treatment
Polishing
Transport Package
Carton, Wooden Box, Bag, etc.
Specification
Customizable
Product Description
Product Description
Extension springs, also known as helical tension springs, are generally of equal pitch and mostly cylindrical. They can be used on many occasions, such as production assembly, experimentation, research and development, maintenance, etc.
Tuohai can provide all kinds of stainless steel tension springs in standard and non-standard sizes, and accept various customizations, including size, packaging, materials, etc.
Contact Us to Get the Best Quote Now.
Detailed Photos
Stainless steel tension spring has the advantages of high plasticity, fatigue resistance, and corrosion resistance.
Tuohai has rich experience in the production of tension springs, our tension springs are tightly connected, the surface is uniform and beautiful, the formability is good, the spring back is uniform, and it has a high-cost performance.
Product Parameters
Material:
According to your requirements, we provide various stainless steel for the tension spring, such as: Austenitic Stainless Spring Steel
1Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni14Mo2, 0Cr18Ni12Mo2Ti, 1Cr18Ni12Mo2Ti
Martensitic Stainless Spring Steel
2Cr13, 3Cr13, 4Cr13, 1Cr17Ni2
Or we can provide other materials according to your requirements.
Size:
The standard and un-standard sizes of stainless steel tension springs are available in Tuohai.
We can provide custom stainless steel tension springs of any size according to customer requirements, you just need to send us detailed drawings or samples.
The shape of the hooks at both ends of the tension spring can also be customized.Surface Treatment:
Tuohai can provide various surface treatments for the stainless steel tension springs, including polishing, electrophoresis, etc.
The common surface treatments of Stainless Steel Tension Springs in Tuohai are as below:
| Polishing | Because stainless steel has excellent anti-rust and anti-corrosion properties, polishing is one of the most common surface treatments for stainless steel springs, which can keep the spring as bright as new after long-term use. |
| Electrophoresis | Electrophoresis can make stainless steel springs display various colors, no longer monotonous primary colors, such as black, white, blue, etc., to make the spring more beautiful, and can be used in some applications that need to expose the spring |
| Customization | If you need stainless steel springs with other surface treatments, we can also accept customization, just let us know your requirements, or send samples. |
Usage:
An extension spring also called a tension spring, is a helical spring that bears the axial tension. When not under load, the coils of the tension spring are generally tight and there is no gap between the coils.
Tension springs are widely used in medical respiratory equipment, sports equipment, medical equipment, hand tools, furniture, doors and windows, shock absorbers, pump springs, mechanical and electronic protective hardware, fluid control valves, mechanical aerospace components, actuators, switchgear machines, instruments, and other fields.
Measurement Method of Tension Springs
When you want to purchase the tension spring, you should measure the sizes below:
1. Outer Diameter of Tension Springs
2. Free Height of the Tension Springs
3. The Wire Diameter of the Wire Used for the Tension Springs.
Please use a vernier caliper instead of a tape measure when measuring the tension spring size.
Because the vernier caliper can be accurate to 0.01mm, which is more accurate, while the tape measure can only be accurate to 1mm, which is very error-prone, resulting in a large difference between the measurement result and the actual one.Production Cycle:
Tuohai has several production lines for extension springs, which can provide more than 500k pcs per month.
For the sample order, we can deliver within 3 working days.
For normal orders, the delivery time is around 30 days.
The delivery time for bulk orders will be determined separately according to the order situation and quantity.
Transaction & Payment Methods
Transaction Methods:
According to the customer's requirements, TUOHAI accepts the transaction method including FOB, CIF, EXW, DDU, etc.
Payment Methods:
For regular orders, we accept payment via T/T, L/C, etc.
For the sample orders, if the sample you need is our regular product, or the product is in stock, then the sample is free, you just need to pay the freight.
If the sample needs to be customized, you need to pay the sample fee.
The sample fee will be refunded after placing the order, in addition to T/T, you can also pay the sample fee by Paypal, Western Union, etc.
Packaging & Shipping
Packages for Tension Springs:
Tuohai accepts customization of various packaging for the stainless springs including:
| 1. Sack Package | This is a very cost-effective way of packaging. |
| 2. Wooden Package | Available with or without inner packaging. |
| 3. Paper Package | The carton can be printed with a logo or pattern according to customer requirements. |
| 4. Plastic Bag Package | Various patterns or logos can be printed according to customer requirements. |
Shipping Method:
If you don't know how to ship goods back from China, or you are sourcing goods from China for the first time, please don't worry, we have our own freight forwarder which can deliver your cargo to any port or location you designate.
We can deliver the extension springs by sea, by air, or by train, according to your requirement.
For the sample order, we will send the sample by express, such as DHL, FedEx, UPS, EMS, etc.
Our Advantages
Rich Experience
After years of production and research on springs, Tuohai has accumulated a lot of experience.
Our products are exported to more than 20 countries around the world, so we have a deep understanding of the markets of various countries and can launch suitable products for the markets of various countries.
We accept several customizations about the springs, including the size, shape, material, surface treatment, package, etc.Excellent Team
Tuohai has an experienced team of engineers who have many years of experience in springs and their accessories. They can quickly respond to questions raised by customers and propose perfect solutions.
Our sales and after-sales team are online 7*24, and all messages from customers can be replied to within 1 hour (When on holiday, will be replied to within the same day). For after-sales problems of products, our after-sales team will propose solutions within 48 hours.High-Quality Raw Materials
We are close to the raw material production place, maintain long-term cooperation with many material manufacturers, and have a strict material screening process to ensure that all materials are of high quality.
When storing materials of tension springs, ensure that the warehouse is ventilated and dry to avoid rust and oxidation of materials.
Advanced Production Line
Tuohai has several advanced CNC spring production lines, the maximum wire diameter of the spring can reach Φ60mm,
We have realized fully automatic production, which greatly improves production efficiency, shortens the production cycle, and saves a lot of waiting time for customers.
Strict Quality Inspection
Tuohai has perfect quality inspection rules. Every process will be randomly inspected, and all the tension springs must be sampled again before leaving the factory. All unqualified batches will be reworked or scrapped after inspection to ensure that all springs received by customers are qualified.
After Sales Service
Tuohai has a professional after-sales team that is 7*24 online, if there have any questions after receiving the goods, you can contact us at any time.
After receiving the feedback from customers, we will verify and confirm with the production workshop immediately. If there is a quality problem, we will find out the cause of the problem as soon as possible, and propose a solution within 3 working days.
FAQ
Q: What springs can you produce?
A: Tuohai can produce all kinds of compression springs, extension springs, torsion springs, conical springs, ball springs, wire forming springs, etc., and can produce all kinds of non-standard springs or special-shaped springs according to customers' drawings.
Q: What are the wire diameters of the springs you can produce?
A: Tuohai has a number of fully automatic CNC spring production lines, which can produce springs of various wire diameters and standard sizes, and accept the customization of non-standard size springs. The largest wire diameter spring currently produced is 60mm.
Q: What surface treatment you can provide for the stainless springs?
A: We can provide the surface treatment of polishing and electrophoresis for stainless springs.
Q: Why some stainless steel springs are also magnetic?
A: Taking 304 stainless steel spring as an example, 304 stainless steel belongs to austenitic stainless steel. Austenitic stainless steel will be converted into martensite in a small amount during cold working. Martensite is magnetic, so 304 stainless steel spring is non-magnetic or micro-magnetic.
Q: Can I get the sample?
A: Yes.
Q: How do I customize my spring?
A: You just need to send us the detailed drawing of the spring you need or send us a sample directly, and we will produce it according to the drawing or sample.
Q: How long will the delivery time be?
A: It depends on quantity, the general delivery time is about 20 to 30 days, and large orders need to be reconfirmed.
Q: What surface treatments do your springs have?
A: We can provide surface treatment such as polishing, galvanizing, copper plating, chrome plating, electrophoresis, and powder coating for springs
Q: What payment methods are accepted?
A: We accept T/T, L/C, etc.
Q: What are the transaction methods?
A: We accept FOB, CIF, DDU, DDP, etc.
Q: Where is your factory?
A: Our factory is in Nantong City, Jiangsu Province.
Address:
Taizhou Jiangsu China, Taizhou, Jiangsu, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Arts & Crafts, Light Industry & Daily Use, Tools & Hardware
Management System Certification:
ISO 9001, ISO 14001
Company Introduction:
Rich product variety
Tuohai is a professional hardware products company, founded in 1992, its business scope includes all kinds of non-welded chains, welded chains, springs, hooks, etc. The main products are double ring chains, jack chains, window sash chains, chain connection accessories, pet chains, tie-out chains, tension springs, compression spring, torsion spring, various special-shaped springs, and their connectors, etc.
Strong technology
The company has a number of production and appearance patents and has more than 300 production lines for chains, springs, and various accessories, and most of them have achieved fully automatic production. There are production workshops in Nantong City, Jiangsu Province, Taixing City, and Guangzhou City, Guangdong Province, with an annual output of 600 tons of various chains and 400 tons of various springs and accessories, which can meet the needs of our customers.
Accept all kinds of customization
Our products are exported to more than 20 countries and regions around the world, we are well-versed in the market laws of most countries in the world and accept various product customizations, including size, material, packaging, etc.
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