Product Description
Zinc-plated extension springs are made of various types of spring steel, and the surface is zinc-plating. Since the material cost is much cheaper than stainless steel, the price of zinc-plated extension springs is more competitive than that of stainless steel extension springs.
In addition, zinc-plated extension springs have good anti-corrosion and anti-rust properties, so the application range of zinc-plated extension springs is larger and more popular than stainless steel tension springs.
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Detailed Photos
Tuohai can provide all kinds of zinc-plated steel extension springs, including blue zinc plating, color zinc plating, white zinc plating, etc.
According to the shape of the hooks on the ends of the spring, Tuohai can provide the extension springs as below:
The Extension Springs with Hooks in the Middle
The Extension Springs with Side Hooks
The Extension Springs with Semicircle Hooks
The Extension Springs with Triangle Hooks
The Extension Springs with Square Hooks
The Extension Springs with Inclined Round Hooks
The Extension Springs with Long Hooks
etc.
Product Parameters
Material:
According to your requirements, we provide various steel for the extension springs, such as:
Carbon Steel 72A
Carbon Steel 72B
Carbon Steel 82B
Spring Steel 65Mn
Spring Steel 60Si2Mn
Spring Steel 55CrSi
etc.
Or we can provide other materials according to your requirements.
Size:
The standard and un-standard sizes of extension springs are available in Tuohai.
We can provide custom extension springs of any size according to customer requirements, you just need to send us detailed drawings or samples.
Surface Treatment:
Tuohai can provide various zinc-plated springs, including blue zinc-plated, color zinc-plated, white zinc-plated, etc. Different kinds of zinc plating can be distinguished according to the color of the galvanized layer.
Measurement Method of Extension Springs
When you want to purchase the extension spring, you should measure the sizes below:
1. Outer Diameter of Extension Springs
2. Free Height of the Extension Springs
3. The Wire Diameter of the Wire Used for the Extension Springs.
4. The Size if the Hook on the Both End of the Spring.
Please use a vernier caliper instead of a tape measure when measuring the extension 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.
Usage:
The extension spring also called tension spring, is a helical spring that bears the axial tension. When not under load, the coils of the extension springs are generally tight and there is no gap between the coils.
The extension 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.
Production Cycle:
Tuohai has several production lines for the 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 Extension Springs:
Tuohai accepts customization of various packaging for the 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 dog stakes 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 and has a number of independent patents including production and shape patents.
Our production line is fully automatic production, which can realize 24-hour unattended production, which can save a lot of labor costs, greatly improve production efficiency and shorten the production cycle.
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.
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 extension 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.
Various Shapes can be Customized
If there have special requirements for the tension spring or the hook shape of the two ends of the tension spring, you only need to send us the drawings or dimensions, and we can produce them according to your requirements.
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, tension 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: 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 coated 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.